To reply to a digest, insert the relevant message header; don't reply to the digest header ------------------------------------------------------------- Research in Australia has come up with conclusions that confirm the Evolutionary Fitness premise, yet the researchers are not bright enough to make the obvious jump. It concerns osteoporosis – in both men and women (one in four Australian men will have osteoporotic fractures at some time). They are saying that exercise can give bone strength, provided the exercise is: # dynamic # high magnitude (in relation to body weight) # high strain (that is, involves quick movements) # applies unusual loading patterns - avoid a set exercise routine # low reps is OK if above conditions met. Meeting the above conditions also increases the likelihood of avoiding injury They make the following points as well: # good exercise includes: sprinting, slalom running, hurdling, jumping, skipping, jumping off heights # jogging is bad for bone strength # exercise before puberty is up to four times as effective as post puberty exercise. Pre-puberty exercise increases bone size and lasts for life; post puberty exercise increases bone density, but the density reduces once the exercise stops. The item on osteoporosis is followed by another looking at why older people are reluctant to exercise. This is mainly about our culture, perception, the attitudes of others and our susceptibility to those attitudes The full transcript can be found at: http://www.abc.net.au/rn/talks/8.30/helthrpt/stories/s1225732.htm Keith ----------------------------------------------------------------- The FAQ for Evolutionary Fitness is at http://www.evfit.com/faq.htm To unsubscribe from the list send an e-mail to [log in to unmask] with the words SIGNOFF EVOLUTIONARY-FITNESS in the _body_ of the e-mail.