Extra plastic is extra work for the shoulder
A bare hand is a small paddle. Clip a plate on it and every catch holds more water. That is the training idea, and it is also the injury idea. I have watched more age-group shoulders get loud from paddles than from missing a pull buoy. The buoy floats the hips. The paddle asks the joint to tow a door.
Coaches still use them, on the sets they wrote. The mistake is treating the object like goggles: something you buy overnight because the squad looked strong. Goggles keep water out of your eyes. Paddles change the load. If land work is already on the week, see what dryland swimming is. Both belong to the coach. Neither belongs in a kitchen programme you invented because Tuesday looked light.
This is not medical advice. Arena puts the shoulder on the finger-paddle page. FINIS calls Agility low-impact. Speedo sells Power Plus for the strongest swimmers on a long pull set. Those are not the same job. Do not buy as if they were.
Size to the hand. Extra-large is not a gift
The hand is the measuring tape. If the plate is much wider than the palm, you bought torque. The catch is late, the elbow drops, and the extra rim still holds water. That water goes into the front of the shoulder.
FINIS is blunt about this on Agility. The official Floating Agility tech sheet sizes by hand circumference, not by how fast you think you are. Extra-small is a 5.8 inch paddle, 14.7 cm, for a hand of 7 inches or less, marked youth. Small 6.5 inches, hands 7 to 8. Medium 7.25, hands 8 to 9. Large 8 inches, hands 9 inches or more. That large is still shorter than Speedo's medium Power Plus. Read that again before you click XL because a senior looks like a water polo player.
TYR's answer is more sizes. The Catalyst Stroke Training Paddles run XXS through XXL, seven of them, clear K-Resin so you can see where the hand sits. Pick the one that follows the palm. Do not skip two sizes because the medium looked modest in the photograph.
| Paddle, 23 Aug 2026 | How it stays on | What the brand still prints |
|---|---|---|
| FINIS Agility Floating | Strapless. Thumb hole. Palm pressure | Falls off if the stroke is wrong. Convex. Early vertical forearm. XS to L by hand circumference. Now a floating material. $26 on finisswim.com |
| Speedo Power Plus | Tube straps, holes for strapping | Scalloped edges, water pass-through. S 7.1 × 6.0 in, M 8.6 × 7.0, L 9.2 × 7.5, XL 9.6 × 7.9. Four sizes for resistance, drills, stroke choice |
| Arena Elite Hand Paddle II | Multiple silicone strap positions | Stroke training, catch and pull, large centre hole for water feel. 4 sizes XS to L. 90% polypropylene, 10% silicone. PVC free. Product 004409 |
| Arena Elite Finger Paddle | Straps on the fingers, palm free | Works the catch and the lower arm. Official line: reduces the risk of shoulder injury compared to full-size paddles. One size. Product 95251 |
| TYR Catalyst | Silicone tubing, gridded lacing | Follows the palm. Clear so you can check hand position. K-Resin. Seven sizes XXS to XXL. SKU LCATSTK. $39 on tyr.com |
Do not buy extra-large because they might grow. A slack paddle is not school shoes. Do not strap a late catch onto a dinner plate and call it strength. Do not add paddles on land-work night, championship week, or a growth-spurt evening because the basket had a deal.
Strapless Agility is a tell, not a trophy
Open Agility Paddles Floating on finisswim.com and the first job is feedback, even after one lap. The strapless shell follows the hand. You keep it on by putting pressure through the palm. If you do not, it shifts or falls off. FINIS wrote that on purpose. The tech sheet adds the coaching English: stay on if you keep a high elbow through the pull, the early vertical forearm. Convex shape. Streamlined thumb hole. Do not grip. Apply palm pressure. All four strokes. SKU 1.05.129.
The floating material is the 2026 object: same idea as the older Agility, now buoyant so a dropped plate is a retrieval. FINIS sells that for learn-to-swim and open water. For a club age-grouper the useful bit is still the drop. A paddle that leaves when the entry is a mess is doing its job. Week one feels insulting. That is the point.
I do not treat FINIS's "build muscle safely" line as a medical claim. Strapless is safer as information. It will not save a shoulder you then load with 400 paddled on a tired Friday. It will tell you the catch folded.
That is usually size or catch, not a broken product. Measure the hand against the FINIS chart. Then ask the coach whether this set was even a paddle set. Buying a strapped plate so it cannot leave is how you silence the tell and keep the load.
Power Plus stays on. That is the whole argument
Speedo's Adult Power Paddle Plus is the opposite object. Tube straps. Scalloped edges Speedo says help you push more water on a smoother pull. Multiple holes for water pass-through and for where you thread the straps. Four sizes. On the US page on 23 August 2026 the tape is printed in inches: small 7.1 by 6.0, medium 8.6 by 7.0, large 9.2 by 7.5, extra-large 9.6 by 7.9.
UK and Canada copy on the same family still talks about a wide surface, the anchoring catch and finish, high elbows, and a thick durometer for the strongest swimmers in a long pull set. That last clause is the honest one. This is the paddle you keep on when the coach wrote pull. It will not fall off because you missed the catch. The shoulder still did the extra work. The strap made sure of it.
FINIS large is 8 inches long. Speedo small is already 7.1, and Speedo medium is 8.6, past Agility's top size. If you came from strapless feedback and "upgraded" to Power Plus medium because Agility felt small, you did not upgrade. You bought a bigger door and a way to keep it tied to the hand. For a senior pull set the coach named, that can be the right door. For a parent shopping at 11pm, it is how a twelve-year-old inherits an adult large.
Arena's plate, Arena's fingers, TYR's seven sizes
Arena splits the job on purpose. The Elite Hand Paddle II is the full plate: flat surface for catch and pull, holes plus a large centre hole so you still feel water, multiple strap positions, smooth edges, PVC free. Four sizes, XS to L. Material on the US page is 90% polypropylene, 10% silicone. Product 004409. A smooth face and a textured face is feel, not a reason to size up.
Then the smaller cousin. The Elite Finger Paddle sits on the fingers and leaves the palm in the water. Arena's own nutshell: it reduces the risk of shoulder injury compared to full-size paddles. One size. Product 95251. That is a manufacturer line, not a clinic note. I would still rather a coach name the tool than a parent pick fingers because a forum said they are safer. They are less plate. Less plate is less lever.
TYR Catalyst is the sizing lecture in resin. Clear paddle, see the hand, seven sizes, silicone tubing, gridded lacing, follows the palm. $39 on tyr.com. If the club already wears TYR, stay in that chart. Do not mix an Agility catch drill with a Catalyst extra-large because the drawer had both.
Strapless tells you the catch folded. Straps make sure the shoulder still tows the plate. Those are different tools. Amazon does not know which set is on the whiteboard.
This is a coach tool, not a parent Amazon panic-buy
If the squad already has a bucket of paddles, you do not need a personal pair that lives under the car seat. If the coach has not named paddles for this group, do not introduce them because a senior reel made the splash look expensive. Ask once: which paddle, which size, on which sets. Then stop coaching the equipment.
Age-group is not senior. A ten-year-old's paddle, if they have one at all, should look like the FINIS extra-small or a finger paddle, not like lane four's dinner plates. Growing into a large is a myth we stole from winter coats. The coat does not load a joint thousands of times a week.
Same rule as fins. Extra surface on the feet is another kind of load. Read blades as equipment the coach owns, the same way this page treats plates. The related fins guide lives beside this one for that reason, not because every swimmer needs both in the bag tomorrow.
"Do they need their own paddles, and which size matches this hand?" is a fair question. "I ordered extra-large so they can grow, and we'll put them on for the last 200" is a programme. You are not writing one.
Log the paddle set after you take them off
A watch will count metres. It will not always tell you those metres were paddled. The useful line is short: paddles on, roughly how much, how the shoulders sat. "8 × 50 paddles, left shoulder heavy" is a record.
Write it in the same session, after the plates come off, so the week is one picture. If they stopped early, write stopped. A mystery ache in March is often a January of extra surface that never made the log.
When the shoulder talks, the paddle comes off
This is not medical advice. Ordinary tiredness after a new paddle set happens. Tell the coach if it is a lot. Do not size up to "get used to it."
Stop, take the paddles off, tell the coach, and see a GP or a qualified physio when it is sharp, sudden, one-sided in the shoulder, swollen, waking them at night, or changing the stroke. Sit the plates out. Write it. Do not stretch a sharp joint in the car park, and do not buy a bigger paddle to strengthen the sore bit.
This page is the dictionary: load, size, strapless versus strapped, who buys them. It is not sets, not a 10 × 100, and not a reason to put plates on every warm-up. The coach already has the whiteboard.
