"The leg strength you gained by skating seemed to help you hit the ball farther, " he says.
Dr. Chang says it requires a combination of cardiovascular endurance and leg strength and can be more strenuous than cross-country skiing.
The most important is leg strength, followed by accuracy on field goals over 40 yards, and how they did on clutch kicks in college.
But Jeter wasn't afforded a normal off-season, and has admitted that his leg strength and stamina are well behind where they usually are at this point.
WSJ: N.Y. Yankees: There's No Defense for Derek Jeter's Glove
Silberman will compete against more accomplished or polished college kickers, all hoping to prove they have the leg strength and accuracy worthy of earning an invite to an NFL training camp.
As evidence, they cite a 12-week scheme using weights that helped women 64 and above to double their leg strength and a walking program that reversed decades of declining lung function in a group in their seventies.
Webber, 32, has been working to get strength back in his leg and as well as improving his fitness in the pool and on a static bike, he has been using a cryogenic chamber to help knit the broken bones together.
Fears about rising oil prices have taken a leg out from under the energy sector, once a pillar of strength in the markets.
Hiddink was not satisfied with his team's use of the ball in possession but says their mental strength played a significant part in going into the return leg on 6 May on level terms.
Guardiola has the option of restoring Pique to his starting lineup to combat Drogba's strength, having sprung a surprise by leaving the Spain international out of both the first leg and the game against Madrid.
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