Sounds like tennis could have caused it easily. Go with heel inserts and well padded shoes in the future. And the fins are not good for achilles tendons. You could eventually do exercises to strengthen your calves or talk to an orthopedist/Podiatrist to talk to a Physical Therapist about exercises that strengthen your calves and prevent achilles tendinitis or tendenopathy. But you do need to heal, and achilles injuries can certainly become chronic. Watch your pushoffs also since they strain the ankle if you push too hard and too consistently. They can even be avoided altogether. A good shoe insert is available from Heel that pain, an online company that sells gell inserts as well that help your achilles. I personally think a well padded running show with gel is one of the best ways to reduce inflaming achilles tendons. Don't run, and watch both kicking and push-offs since they also tax the ankle, considerably worse than the flutter kick. Kicking from the hip with no fins is likely best. You're getting good advice.
Sounds like tennis could have caused it easily. Go with heel inserts and well padded shoes in the future. And the fins are not good for achilles tendons. You could eventually do exercises to strengthen your calves or talk to an orthopedist/Podiatrist to talk to a Physical Therapist about exercises that strengthen your calves and prevent achilles tendinitis or tendenopathy. But you do need to heal, and achilles injuries can certainly become chronic. Watch your pushoffs also since they strain the ankle if you push too hard and too consistently. They can even be avoided altogether. A good shoe insert is available from Heel that pain, an online company that sells gell inserts as well that help your achilles. I personally think a well padded running show with gel is one of the best ways to reduce inflaming achilles tendons. Don't run, and watch both kicking and push-offs since they also tax the ankle, considerably worse than the flutter kick. Kicking from the hip with no fins is likely best. You're getting good advice.
Pull buoys are great, but don't overuse your shoulders. If you are over 35, be careful with hand paddles or don't use them. Switching stroke is good, but *** stroke can also be hard on a strained achilles. Back stroke without a high speed kick cadence i also an option. Of course soft soft fins are better, but I would avoid fins altogether for awhile. Achilles tendonitis can also present like Plantar fascitis as well, so be aware of that.
I've had achilles tendonitis and it has become far more noticeable past the age of 65. The easiest solution is rest, stop using fins, and seriously reduce or change the way you push off from the wall. Walking too much has also aggravated the problem, but then remember I'm older than most masters swimmers. Fins are very risky with AT, but pulling, freestyle, backstroke are usually ok, though be aware you must seriously reduce loading your ankles, and become more aware of what motions load your ankles; this always includes kicking, but how intensely you kick is important to analyze. Tendon ware is a function of aging in most people, so AT usually gets worse and/or more common with age. It can heal, but heals more quickly the younger you are, and how effectively you schedule a long rest interval to give it time to heel. What you can do with AT depends on how old you are, how bad the AT is, and what exactly is causing the AT. I've been told by a orthapedic surgeon that strengthening your calf muscles can help reduce the liklihood of AT, but you should talk to a Doctor or physical therapist about this first. You have options, and AT usually gets better if you treat it and are careful. Don't fall into the rut common with masters swimmers of continuing to swim with an injury!!!