A fixed dimension is one of disadvantages of most paddles that does not allow sportsman to adjust propulsion of hand in water for sportsman's objectives during training process.
The other major
disadvantage of these devices is rigidity of construction required to create resistance during
stroke.
In this case palm and hand lost natural / free flexibility in contact with water.
After swimming with the paddles, after their removal, the absence of the sense of water does not allow swimmers to transfer trained power to
swimming speed.
For keeping maximum of sensitivity and mobility or
motility of a hand during operation surgeon uses thin
surgical gloves because any dense, non-elastic materials, reduce sensitivity and mobility or
motility of his hand.
Back to the swimming paddles reviewed above they enable to change very few parameters of position of a hand and a
forearm in water (for example, angle between fingers and palm, position of fingers and so on) but they don't allow swimmer to keep sensitivity and mobility or
motility of a bared hand, forearm, or arm during
stroke.
The other
disadvantage is fixed dimensions that don't allow swimmer to set (or fix) required parameters of propulsion of hand in water for sportsman's objectives during training process.
However, a swimmer can't get sense of water of his / her bare hand propulsion during stroke.
The disadvantage is fixed dimensions that don't allow sportsman to set / fix required parameters of propulsion of hand in water for sportsman's objectives during training process.
Other disadvantage of such devices is that
training effect after training comes only in a few days or more.
However, their disadvantages are off-key / forced position of fingers during strokes in swimming, as well as impossibility of exact settings of parameters of gloves corresponding to propulsion of hand in water that is required for sportsman.
The other disadvantage of such devices is that
training effect after training comes only in a few days or more.
To their disadvantage is an off-key / forced position of fingers during strokes in swimming.
The second disadvantage is rigidity of construction required to create resistance during stroke.
Rigidity of material is required to fix hydrodynamic properties of dumbbells, but simultaneously sportsman loses his hand's natural sensations during strokes.
The other disadvantage of such devices is that training effect after training comes only in a few days or more.
Their disadvantage is an off-key or forced position of fingers during stroke in swimming and as a result loss of feel and
sensation of water
stream by palm or hand.7) Devices attached to the side surface of hand or (and) arm (for example, SU 1443907, U.S. Pat. No. 6,743,023 B2, GB2423259 (A), U.S. Pat. No. 3,827,095, US 20090318041).
However, these devices are used to improve swimming techniques and not for immediate detection of sense of water.
Disadvantage of such devices is that training effect after training comes only in a few days or more.
Effects of these devices are not related to improve propulsion of hands in water during stroke.
More over if these devices are used to improve the hand propulsion there are same disadvantages as described in the previous training means above.9) Non-
inflatable devices having glove or mitten form.
Such devices are used for easy, comfortable and fast swimming (for example, SU952280, U.S. Pat. No. 3,874,014), but not assist in improving propulsion technique of swimming.
More over if someone uses these devices to improve hand propulsion there are same disadvantages as described in the previous training means above.10)
Inflatable devices having glove or mitten form.
Such devices are used to retain hands afloat, or for easy and comfortable swimming (for example, U.S. Pat. No. 4,676,760, U.S. Pat. No. 4,690,651 A, CH 184900 (A), US D299262), or for comfortable working under water (for example, U.S. Pat. No. 5,025,502 A), or as water-rescue equipment (for example, SU450740, U.S. Pat. No. 4,547,919 A, US D299262) but all of them don't assist in improving propulsion technique of swimming.
More over if someone uses these devices to improve hand propulsion there are same disadvantages as described in the previous training means above.
Other disadvantage is fixed dimensions that don't allow adjusting and setting required propulsion of hand in water for sportsman's needs during training process.12) Special device called PT Paddles or Palm Paddles or Egg Trainer (official website link is http: / / www.swimsmooth.com / ptpaddles.
html).
Other disadvantage is fixed dimensions that don't allow adjusting and setting propulsion of hand in water for sportsman's needs during training process.
The other possible disadvantage is complicated
usability.14) Device U.S. Pat. No. 3,835,493 is a swim fin of fabric type material.
Impossibility of improving of propulsion technique of hands is to their disadvantage.
Other disadvantage is fixed dimensions that don't allow adjusting and setting propulsion of hand in water for sportsman's needs during training process.15) Device described in the patent U.S. Pat. No. 7,582,045.
Its disadvantage is an unnatural position of hands during strokes.
Other disadvantage is that the device assists in strengthening of swimmer's hands but not in improving propulsion techniques.16) Device described in the patent U.S. Pat. No. 5,820,526 A. It is a weighted
aquatic exercise glove with
variable resistance.
Unnatural / forced position of fingers during the stroke and the delayed training effect are to their disadvantage.
Other disadvantage is that the device assists in strengthening of swimmer's hands and arms but not in improving propulsion techniques.17) Device described in the patent U.S. Pat. No. 4,832,643.
One disadvantage is the delayed training effect.
The other disadvantage is fixed dimensions that don't allow adjusting propulsion of hand in water for sportsman's needs during training process.18) Device described in the patent U.S. Pat. No. 3,827,095.
One disadvantage is that the device is used for easy and comfortable swimming and
underwater works, but it doesn't assist in improving propulsion techniques.19) Device described in the patent US D299262 for the ornamental design for an
inflatable swimming glove.
Disadvantages are the delayed training effect and forced position of hands during stroke.
Other disadvantage is that the device doesn't assist in improving sense of water or feel of support in water; the device is used for improving a
speed factor of stroke (a
stroke frequency factor).