阅读说明：本技术 一种自由泳陆上训练器 (Land trainer for free swimming ) 是由 邓云锋 柏开祥 李春艳 杨威 王治华 闫慧云 焦垚清 褚子雯 于 2020-08-12 设计创作，主要内容包括：本发明提供一种自由泳陆上训练器,底座上并列设置转动支撑装置,转动支撑装置上分别设置前躺板、后躺板；电机传动装置驱动转动支撑装置带动前躺板、后躺板左右转动；转动支撑装置通过转动轮带动转动杆推动转动支撑杆在限位槽筒内上下移动,转动支撑杆分别带动前躺板、后躺板左右转动；前躺板两侧设置伸缩导引轨道,伸缩导引轨道内设置滑轮,滑轮上连接有手套、拉线；底座一端设置风阻器和拉线杆,风阻器内设置转速传感器,风叶轮转轴上设置传动轮；拉线杆上设置有拉线轮,滑轮上拉线绕过拉线轮、传动轮接入拉力传感器与弹性拉线连接。本发明可真实模拟最佳水中划臂动作教学训练,并收集划臂和转体的配合数据方便教学。(The invention provides a free swimming land trainer.A base is provided with rotating support devices in parallel, and the rotating support devices are respectively provided with a front lying plate and a rear lying plate; the motor transmission device drives the rotation supporting device to drive the front lying plate and the rear lying plate to rotate left and right; the rotating support device drives the rotating rod through the rotating wheel to push the rotating support rod to move up and down in the limiting groove drum, and the rotating support rod respectively drives the front lying plate and the rear lying plate to rotate left and right; the two sides of the front lying plate are provided with telescopic guide rails, pulleys are arranged in the telescopic guide rails, and the pulleys are connected with gloves and pull wires; one end of the base is provided with a wind resistance device and a wire drawing rod, a rotating speed sensor is arranged in the wind resistance device, and a rotating shaft of the wind impeller is provided with a driving wheel; the stay wire rod is provided with a stay wire wheel, the stay wire on the pulley bypasses the stay wire wheel, and the driving wheel is connected with the tension sensor and is connected with the elastic stay wire. The invention can truly simulate the optimal water arm-drawing action teaching training and collect the matching data of the arm-drawing and the rotating body for convenient teaching.)

1. The utility model provides a freestyle land training ware, includes the base, its characterized in that: the base is provided with rotating support devices in parallel, the rotating support devices are respectively provided with a front lying plate and a rear lying plate, and the front lying plate and the rear lying plate are longitudinally arranged in front and at the back;

the rotary supporting device is fixed on the base through a supporting frame, a limiting groove drum is fixedly arranged at the upper end of the supporting frame, the supporting frames are respectively arranged on the left side and the right side of the base, a rotating shaft is arranged between the supporting frames, rotating wheels are arranged at two ends of the rotating shaft, and a rotating shaft is arranged on the end faces of the rotating wheels;

the lower surfaces of the front lying plate and the rear lying plate are respectively fixedly provided with a cross beam, two ends of the cross beam are respectively penetrated with a hinged shaft to be hinged with a rotating support rod, the rotating support rod is sleeved in a limiting groove barrel and can move up and down and can rotate along the cross beam, one end of the cross beam is provided with a sliding groove, and the hinged shaft is arranged in the sliding groove and can move;

the lower end of the rotating support rod is hinged with a rotating rod, the rotating rod is hinged on a rotating shaft on the end face of the rotating wheel, the rotating wheel rotates to push the rotating support rod to move up and down in the limiting groove drum through the rotating rod, and the rotating support rod drives the front lying plate and the rear lying plate to rotate left and right respectively;

longitudinal balance plates are respectively arranged on two sides of the lower surfaces of the front lying plate and the rear lying plate and are respectively and fixedly connected to the rotating support rods;

telescopic guide rails are respectively arranged on two sides of the front lying plate, pulleys are arranged in the telescopic guide rails, and gloves and pull wires are connected to the pulleys;

one end of the base is provided with a wind resistance device and a wire drawing rod, a wind impeller rotating shaft, a wind impeller and a rotating speed sensor are arranged in the wind resistance device, and a driving wheel is arranged on the wind impeller rotating shaft; the transmission wheel drives the wind impeller rotating shaft and the wind impeller to rotate, the wire drawing rod is provided with a wire drawing wheel, the pulley winds on the telescopic guide rail, the pull wire on the pulley winds the wire drawing wheel, and the transmission wheel is connected with the elastic pull wire.

2. The freestyle land trainer of claim 1, wherein: the utility model discloses a solar battery back creeper, including preceding creeper, back creeper both sides axis of rotation, install the transmission shaft between preceding creeper, the back creeper both sides axis of rotation, the axis of rotation of back creeper is driven by motor drive, the axis of rotation of creeper rotates before the transmission shaft drive, the different adjustable just rotation frequency unanimity of rotation angle about preceding creeper, the back creeper.

3. The freestyle land trainer of claim 1, wherein: the pull wire on the pulley is a non-elastic wire.

4. The freestyle land trainer of claim 1, wherein: the pulley is provided with a pull wire which bypasses the pull wire wheel, and the driving wheel is connected with the tension sensor and is connected with the elastic pull wire.

5. The freestyle land trainer of claim 1, wherein: the elastic pull wire comprises an elastic metal wire, an elastic metal plate and the like.

6. The freestyle land trainer of claim 1, wherein: the front part of the front lying plate is provided with a face hole, and the rear part of the front lying plate is provided with a binding band; and a lower limb fixing device is arranged on the rear lying plate.

7. An freestyle land trainer according to claim 1 or 4, in which: and the rotating speed sensor and the tension sensor are respectively connected to a computer.

Technical Field

The invention belongs to the field of sports equipment, and particularly relates to a free swimming land trainer.

Background

Free swimming is one of swimming match items, and is a swimming gesture in which arms move from the water surface to cut water under water and the two arms continuously and alternately perform. The swimming speed of the athlete is mainly 85 percent of the total thrust provided by the upper limb stroke, and the difference between the swimming speed of the legging and the swimming speed of the non-legging is only about 10 percent. Therefore, the paddling of the two arms is very important for the achievement of the free swimming, and the two arms can be matched with the turning body to better complete the technical action.

From the freestyle teaching, freestyle motions are divided into freeplay arm motions and freestyle body rotation motions. Free swimming arm motion: 1) entering water: after the arms move in the air, the big arms rotate inwards, the fingers stretch straight and naturally gather together, and the palm is naturally inserted into the water towards the oblique lower part outside in the posture of high elbow and low hand; 2) carrying out water holding: after the palm center begins to change from the oblique direction to the oblique direction, gradually bending the elbow and the wrist, wherein the elbow is always higher than the arm; 3) paddling: the arms rotate in coordination with the shoulders, the big arms rotate inwards to drive the small arms, the bent arms gradually straighten the thighs to paddle water, the palm center is changed from the lower part in the oblique direction to the upper part in the oblique direction, and the thighs paddle water from bottom to top; 4) water outlet: the palm center turns to the thigh, the fingers firstly draw the water surface upwards, the elbow is slightly bent, the arms are relaxed, the big arm drives the small arm, the elbow part is lifted upwards, the palm center turns to the upper back, and the whole water outlet process needs to be coherent, quick and uninterrupted; 5) moving the arm in the air: the elbow is in a lifting state, the elbow is higher than the arm at the moment, the arm is moved towards the front of the body, the hand feels the action of inserting water, and the preparation of the next water-entering action is carried out; the action of free-swimming body rotation: from the beginning of the water holding action, the body rotates along with the water holding action to the arm on the water holding side until the body rotates to the maximum angle (19.7 degrees for men and 24 degrees for women) when the water outlet action is finished, and then the body rotates to the horizontal position along with the action of moving the arm in the air.

At present, in the free swimming training, the land standing position and the body inclined position in water are adopted for decomposition exercise, and the exercises are too abstract and have poor effect in the early learning stage or when the technical action is improved. The prior disclosed land swimming simulator can not achieve good action shaping of standard arm-drawing action and muscle memory training of standard arm-drawing action because of the lack of specific tracks for free swimming stroke which can not correct action and complete the cooperation of hand-drawing and body-turning.

Free swimming and breaststroke are two most commonly used swimming postures of mass swimming body building, different from breaststroke, land arm bending training of free swimming teaching is more abstract and unintelligible, arm technology and exercise are particularly important for the free swimming training, but no auxiliary instrument for better improving the technical action of the free swimming arm is provided for beginners or sports enthusiasts, and particularly for swimming teaching, the cooperation of free swimming arm bending teaching and turning is a difficult point in the free swimming teaching.

Disclosure of Invention

The invention aims to solve the problem that the teaching difficulty of free swimming on land is the matching of free swimming curved arm stroke teaching and body turning in free swimming training, no specific device is arranged on land to correct the action and complete the matching of a rower and the body turning, and the invention provides a free swimming land trainer which can truly simulate the optimal action of the stroke arm in water and realize the matching of the stroke arm and the body turning and the index data of the stroke arm for achieving the action shaping of the standard stroke arm action and the muscle memory training of the standard stroke arm action and is convenient and effective for the teaching and training of the free swimming land swimming stroke.

In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a freestyle land training ware, includes the base, its characterized in that: the base is provided with rotating support devices in parallel, the rotating support devices are respectively provided with a front lying plate and a rear lying plate, and the front lying plate and the rear lying plate are longitudinally arranged in front and at the back;

the rotary supporting device is fixed on the base through a supporting frame, a limiting groove drum is fixedly arranged at the upper end of the supporting frame, the supporting frames are respectively arranged on the left side and the right side of the base, a rotating shaft is arranged between the supporting frames, rotating wheels are arranged at two ends of the rotating shaft, and a rotating shaft is arranged on the end faces of the rotating wheels;

the lower surfaces of the front lying plate and the rear lying plate are respectively fixedly provided with a cross beam, two ends of the cross beam are respectively penetrated with a hinged shaft to be hinged with a rotating support rod, the rotating support rod is sleeved in a limiting groove barrel and can move up and down and can rotate along the cross beam, one end of the cross beam is provided with a sliding groove, and the hinged shaft is arranged in the sliding groove and can move;

the lower end of the rotating support rod is hinged with a rotating rod, the rotating rod is hinged on a rotating shaft on the end face of the rotating wheel, the rotating wheel rotates to push the rotating support rod to move up and down in the limiting groove drum through the rotating rod, and the rotating support rod drives the front lying plate and the rear lying plate to rotate left and right respectively;

longitudinal balance plates are respectively arranged on two sides of the lower surfaces of the front lying plate and the rear lying plate and are respectively and fixedly connected to the rotating support rods;

telescopic guide rails are respectively arranged on two sides of the front lying plate, pulleys are arranged in the telescopic guide rails, and gloves and pull wires are connected to the pulleys;

one end of the base is provided with a wind resistance device and a wire drawing rod, a wind impeller rotating shaft, a wind impeller and a rotating speed sensor are arranged in the wind resistance device, and a driving wheel is arranged on the wind impeller rotating shaft; the transmission wheel drives the wind impeller rotating shaft and the wind impeller to rotate, the wire drawing rod is provided with a wire drawing wheel, the pulley winds on the telescopic guide rail, the pull wire on the pulley winds the wire drawing wheel, and the transmission wheel is connected with the elastic pull wire.

Preferably, install the transmission shaft between preceding service creeper, the back service creeper both sides axis of rotation, the axis of rotation of back service creeper is driven by motor drive, the axis of rotation of service creeper rotates before the transmission shaft drive, preceding service creeper, back service creeper are controlled the different adjustable and rotation frequency unanimity of rotation angle.

Preferably, the pulley upper pulling wire is a non-elastic wire.

Preferably, the pull wire on the pulley bypasses the pull wire wheel, and the transmission wheel is connected with the tension sensor and is connected with the elastic pull wire.

Preferably, the elastic pull wire includes an elastic metal wire, an elastic metal plate, and the like.

Preferably, the front part of the front lying plate is provided with a face hole, and the rear part of the front lying plate is provided with a binding belt; and a lower limb fixing device is arranged on the rear lying plate.

Preferably, the rotating speed sensor and the tension sensor are respectively connected to a computer.

The invention has the advantages and positive effects that:

1. the free-swimming land trainer comprises a rotary support device, a front lying plate, a rear lying plate, a telescopic guide rail, a front support rod, a rear support rod, a front support rod, a rear support rod and a rear support rod, wherein the front lying plate and the rear lying plate are arranged on the rotary support device; the telescopic guide track is consistent with the researched optimal free swimming rower route, and can be telescopically adjusted according to the arm lengths of different users; the exerciser lies prostrate on the trainer, can train the standard arm-stroke action of the free stroke arm, learn and improve the arm-stroke action of the free stroke, and the speed change and the resistance change of the arm-stroke, such as water holding, water-stroke, water outlet, arm moving in the air, and water inlet, so as to achieve the action shaping of the standard arm-stroke action and the muscle memory training of the standard arm-stroke action.

2. According to the free swimming land trainer, the upper ends of the support frames on two sides below the front and rear lying plates are fixedly provided with the limiting groove barrels, the rotating shaft of the rear lying plate drives the rotating wheel to rotate and drives the rotating rod and the rotating support rod to move up and down in the limiting groove barrels, and the rotating wheel drives the rotating shaft to drive through the motor transmission device so as to complete the up-and-down movement of the rotating support rod in the limiting groove barrels; and meanwhile, the front lying plate and the rear lying plate are driven to respectively rotate left and right on the rotation supporting device, the left and right rotation angle control of the front lying plate is different from that of the rear lying plate, but the rotation frequencies are consistent, the motor is started, and the left and right rotation actions of the free stroke arm during the standard stroke arm action can be trained by selecting a slow gear.

3. The invention relates to a free-swimming land trainer, wherein telescopic guide tracks are respectively arranged on two sides of a front lying plate and used for training left and right arms of a practicer, pulleys and pull wires are arranged in the telescopic guide tracks, a driving wheel drives a fan impeller rotating shaft and a fan impeller to rotate, a resistance is transmitted by a fan resistor, a rotating speed sensor and a tension sensor can test the speed and resistance change of each body position, two hands of the practicer are respectively sleeved on gloves to drive the pulleys to wind the telescopic guide tracks, the pull wires wind the pull wire wheels, and the driving wheel is connected with the tension sensor and an elastic pull wire, so that the practicer can practice the matching between the standard arm-drawing action and the body rotation of a free-swimming arm, learn and improve the arm-drawing action of the free-swimming, and achieve the action mode.

4. The free-swimming land trainer can enable a practicer to lie on the stomach in the trainer, can train the standard arm of the free-swimming arm to move in a rotating way, controls the speed of a fast gear and a slow gear through the motor transmission device, and obtains training index data through the rotating speed sensor and the tension sensor, thereby being not only used for learning the action mode of a beginner, but also used for training the land special strength of professional athletes.

Drawings

FIG. 1 is a schematic view of the present invention in use;

FIG. 2 is a front view of the structure of the present invention;

FIG. 3 is a schematic view of the drive support arrangement of the present invention;

FIG. 4 is a schematic view of the structure of the rotary support rod of the present invention;

FIG. 5 is a schematic view of the construction of the glove, pull cord and pulley of the present invention;

FIGS. 6-8 are schematic diagrams of the trajectory of the arm's movement by the practitioner of the invention using the telescoping guide track.

1-telescopic guide rail, 2-face, 3-bandage, 4-front lying plate, 5-lower limb fixing device, 6-rear lying plate, 7-longitudinal balance plate, 8-limit groove drum, 9-motor transmission device, 10-rotating wheel, 11-base, 12-transmission shaft, 13-support frame, 14-rotating rod, 15-rotating support rod, 16-transmission wheel, 17-windage damper, 18-wire drawing wheel, 19-wire drawing rod, 20-wire drawing, 21-pulley, 22-elastic wire drawing, 23-tension sensor, 24-beam, 25-rotating shaft, 26-glove, 27-rotating speed sensor, 28-wind wheel rotating shaft, 29-rotating support device, 30-transmission support rod, 31-rotating shaft, 32-sliding chute and 33-articulated shaft.

Detailed Description

The present invention will be described in further detail with reference to the following examples and the accompanying drawings.

Referring to fig. 1-8, the present invention provides a freestyle land trainer. The base 11 is made of a bottom plate and supporting legs or a base platform is directly adopted.

Two rotation supporting devices 29 are arranged on a base 11 in parallel from front to back, a front lying plate 4 and a rear lying plate 6 are respectively arranged on the two rotation supporting devices 29, the front lying plate 4 and the rear lying plate 6 are respectively longitudinally arranged from front to back, the front lying plate 4 and the rear lying plate 6 are matched with the prone posture of a practicer, and the front lying plate 4 for upper body prone posture and the rear lying plate 6 for lower body prone posture are matched with each other. The front part of the front lying plate 4 is provided with a face 2 for facilitating the breathing of the face when the head is downward, and the front lying plate 4 is provided with a binding belt 3 for binding the upper body of the practicer; the lower limb fixing device 55 is a safety baffle plate which is arc-shaped and is arranged on the back lying plate 6 and is jointed with the body to bind the lower half body of the practicer.

The rotary supporting device 29 mainly comprises a supporting frame 13, a limiting groove barrel 8, a cross beam 24, a rotary supporting rod 15, a rotary rod 14, a rotary shaft 31, a rotary wheel 10, a rotary shaft 25 and the like. The rotary supporting device 29 is fixedly arranged on the base 11 through a supporting frame 13, the supporting frame 13 is made of steel pressure-resistant materials, the limiting grooved drum 8 is fixedly arranged at the upper end of the supporting frame 13, the supporting frames 13 are respectively arranged at the left side and the right side of the base 11, a rotating shaft 31 is arranged between the supporting frames 13, rotating wheels 10 are respectively arranged at two ends of the rotating shaft 31, and a rotating shaft 25 is arranged on the end faces of the rotating wheels 10.

The cross beam 24 is fixedly installed below the front lying plate 4 and the rear lying plate 6 respectively, two ends of the cross beam 24 penetrate through hinge shafts 33 respectively, the hinge shafts 33 are hinged with rotary support rods 15, the rotary support rods 15 are sleeved in the limiting groove barrels 8, one ends of the rotary support rods 15 rotate along the cross beam 24 and the hinge shafts 33, the rotary support rods 15 can move up and down in the limiting groove barrels 8, the sliding grooves 32 are formed in one ends of the cross beams 24, the sliding grooves 32 are in the shape of long-strip grooves, and the hinge shafts 33 of the rotary support rods 15 are installed in the sliding grooves 32.

The articulated dwang 14 of rotation support pole 15 lower extreme, the one end of dwang 14 can be followed rotation support pole 15 and rotated, and the other end of dwang 14 articulates in the pivot 25 of rotating wheel 10, installs pivot 25 on the rotation wheel 10 terminal surface, and pivot 25 can be epaxial installation bearing, and 14 one end suit of dwang is on the bearing, and rotation wheel 10 can drive dwang 14 and rotate, and dwang 14 drives rotation support pole 15 and reciprocates in spacing groove section of thick bamboo 8.

The two sides below the front lying plate 4 and the rear lying plate 6 are respectively provided with a longitudinal balance plate 7, the two longitudinal balance plates 7 are arranged perpendicular to the cross beam 24, the longitudinal balance plates 7 are respectively and fixedly connected on the rotating support rod 15, and the base 11 is provided with a rotating support device 29 in parallel to respectively drive the front lying plate 4 and the rear lying plate 6 to rotate left and right.

A transmission shaft 12 is arranged between rotating shafts 31 of the front lying plate 4 and the rear lying plate 6, the transmission shaft 12 is supported on a base 11 by a transmission support rod 30, the rotating shaft 31 of the rear lying plate 6 is driven by a motor transmission device 9, the motor transmission device 9 drives the rotating shaft 31 of the rear lying plate 6 and drives the transmission shaft 12 to rotate, meanwhile, the transmission shaft 12 drives the rotating shaft 31 of the front lying plate 4 to rotate, the rotating shafts 31 of the front lying plate 4 and the rear lying plate 6 respectively drive a rotating support device 29 and drive the front lying plate 4 and the rear lying plate 6 to rotate, the left and right rotating angles of the front lying plate 4 and the rear lying plate 6 are different and adjustable, and the rotating frequencies are consistent; the included angle formed by the left and right rotation angles of the front lying plate 4 and the horizontal can be selected from the gears of 19.7 degrees for boys and 24 degrees for girls. The included angle formed by the left and right rotation angles of the back lying plate 6 and the horizontal plane can be selected from two gears of 6.9 degrees for girls and 12.5 degrees for boys.

The two sides of the front lying plate 4 are respectively provided with a telescopic guide rail 1, a pulley 21 is arranged in the telescopic guide rail 1, the joint of the inner side of the telescopic guide rail 1 and the pulley 21 is a smooth surface, the periphery of the telescopic guide rail 1 is made of flexible materials to wrap the pulley 21, and the pulley 21 is connected with a glove 26 and a stay wire 20; the hand of the exerciser is placed in a glove 26 of a suitable size, the glove 26 is connected to the pulley 21, and the pulley 21 is connected to the pull cord 20.

A wind resistance device 17 and a wire drawing rod 19 are installed at one end of a base 11, a wind impeller rotating shaft 28, a wind impeller and the like are mainly installed in the wind resistance device 17, a rotating speed sensor 27 is installed in the wind resistance device 17, a driving wheel 16 is installed on the wind impeller rotating shaft 28 at the outer end of the wind resistance device 17, the wind impeller rotating shaft 28 and the wind impeller are driven to rotate by the driving wheel 16, a wire drawing wheel 18 is installed on the wire drawing rod 19, a pulley 21 winds around a telescopic guide rail 1, a drawing wire 20 on the pulley 21 winds around the wire drawing wheel 18 and the driving wheel 16 and is connected with a tension sensor 23 to be an inelastic drawing wire, the elastic drawing wire 22 is connected with the driving wheel 16 on the wind resistance device 17 to be a rough contact surface and is in friction transmission with the drawing wire 20, the inelastic drawing wire drives the wind resistance device 17 to rotate an impeller rotating shaft 25.

The pull wire 20 is divided into an elastic wire and a non-elastic wire, the pull wire 20 is connected to the pulley 21 and bypasses the pull wire wheel 18 and the driving wheel 16, the pull sensor 23 is connected to the non-elastic wire, the elastic pull wire 22 is arranged from the pull sensor 23 to the tail end of the pull wire 20, the elastic pull wire 22 can be made of an elastic metal wire, an elastic metal plate and the like, and the pull sensor 23 can timely transmit the magnitude of the elastic force generated by the elastic pull wire 22. The rotating speed sensor 27 and the tension sensor 23 are respectively connected to a computer, and the computer receives signals and converts the signals into digital data to analyze rotating speed and tension data.

When the free swimming path trainer is used, firstly, the rotating wheel 10 with a proper radius is selected and assembled on the rotating support device 29, and the proper distance from the rotating shaft 25 to the center of the side face of the rotating wheel 10 is selected and the rotating rod 14 is assembled; the lying plate is adjusted to be horizontal, the rotating speed of the motor is adjusted according to the rotating speed of the body on the motor transmission device 9, the practicer lies on the freestyle training device, the face of the practicer falls into the face hole 2, the length of the front lying plate 4 and the length of the front lying plate 4 which are matched with the height and the arm length of the practicer are adjusted, and the size and the position of the telescopic guide track 1 are adjusted according to the height and the arm length of the practicer. The lower limb fixing device 5 of the back lying plate 6 fixes the lower body to prevent the body from slipping off during rotation, and makes a preparatory posture with both hands extended forward, and turns on the motor.

The motor is started to drive the rotating shaft 31 of the rear lying plate 6 to rotate, the rotating shaft 31 of the rear lying plate 6 drives the upper transmission shaft 12 and the rotating wheels 10 at two sides to rotate, and the transmission shaft 12 drives the rotating shaft 31 of the front lying plate 4 to rotate; the rotating wheel 10 rotates to drive the rotating rod 14 at one end of the rotating wheel 10 to rotate around the rotating shaft 25 while rotating along the circle center of the rotating wheel 10, and the rotating support rod 15 at the upper end of the rotating rod 14 is driven by the rotating rod 14 to move up and down in the groove barrel and drive the cross beam 24 to rotate. Because the cross beam 24 is fixedly connected with the lying plate, the front and rear lying plates 6 can rotate under the drive of the motor, and the practicer rotates along with the front and rear lying plates 6 driven by the motor to perform rhythmic body turning and arm striking exercises. The telescopic guide track 1 is the best free swimming hand arm sliding path of a high-level athlete researched at the present stage, the free swimming stroke arm glove 26 slides in the telescopic guide track 1 through the pulley 21 and drives the stay wire 20 to drive the wind resistance device 17 through the driving wheel 16 to simulate the resistance change of the underwater stroke arm, the stroke arm action can be learned and corrected during the slow stroke arm exercise, the standard free swimming rotation stroke arm exercise can be carried out, and the special strength exercise can be carried out during the fast stroke arm. When the exerciser exercises, the rotating speed sensor 27 and the tension sensor 23 can collect biomechanics data in use and feed the data back to the trainer, so that the exercise plan of the exerciser is further improved.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.