i'd do 5 (or more) sets of calf raises to fatigue on days you really train them, using a weight heavy enough to fatigue them by 20-25 reps.. they respond better to higher rep training imo.
make them stronger and you will jump higher/run faster.
adarqui, Do you think calf/achilles training reacts better to dynamic or isometric work the best?, specifically in the weight room. Or a combo of both?.
Just found this: http://jap.physiology.org/content/107/4/1181.short
What you reckon?.
It states: Isometric contractions reduce plantar flexor moment, Achilles tendon stiffness, and neuromuscular activity but remove the subsequent effects of stretch.
Isn't that a good thing?. Reducing achilles tendon stiffness?.
i hate isometrics with a passion, i love quasi-isometrics (heavy lifting).. much of very heavy lifting are a series of isometric contractions, in a sense. the problem with purely isometric contractions is that, whether yielding or overcoming, their specificity/transfer just plain old sucks.. overcoming isos hit the tendons hard, yielding hits the muscles hard, but they both have horrible transfer to actual dynamic movements imo.. for example, a calf raise iso, you'd be better off just repping out the calf raises on a bar and improving strength through as much of the rom as possible, rather than working different iso angles and hoping it transfers.
isometrics are the devil in disguise.. hardly anyone, anywhere, has ever utilized them to achieve significant gains..
you want to improve strength in the calves/achilles with more transfer to sport/jump/sprint? hit them hard with regular barbell/db calve raises, standing (and possibly seated), and make sure you progress that strength over time.. like i said before, a 1xBW calve raise vs 2xBW calve raise works the exact same as 1xBW squat vs 2xBW squat in regards to jumping/sprinting etc..
regardless of muscle stiffness, tendon compliance, and all that minutia, you want to improve your measurables on the simple isotonic lifts, that's it, nothing fancy.. then you want to jump, sprint, do rebounds, and eat good.. no substitute for that.
isos are a devil in disguise because they seem fancy, are backed by a ton of 'clinical research', but they have no substantial application in ACTUAL performance enhancement, don't care what the inno sport huggers say.
pC hope that helps.. lol
and lol @ axel's nut comment, i love that quote.