Afraid of weak bone health? Switch
to cycling today!
Exercise that
puts greater strain on bones, like running, may help in
improving bone health more effectively than non-weight bearing activities like cycling, finds a new
study. ‘Normal human beings need to exercise moderately to maintain health.
However, those at risk of weaker bones need to take up running rather than
swimming or cycling,’ said lead author Giovanni Lombardi from Istituto
Ortopedico Galeazzi in Italy. The researchers measured glucagon, leptin and
insulin — hormones involved in regulating metabolism — as well as levels of
osteocalcin and P1NP (proteins associated with bone formation) in 17 trained
runners before and after a 65-km mountain ultramarathon run. They compared it
to the hormones and bone constituents of twelve adults of the same age who did
not run the race but did low to moderate physical exercise.
Increasing glucagon levels indicate an energy demand,
whilst increasing insulin and leptin levels indicate adequate or excessive
energy levels, the researchers stated. The findings showed that the ultramarathon
runners had higher levels of glucagon and lower levels of leptin and insulin
when finishing the race as compared to the control group. The falling levels of
insulin ultramarathon runners lead to similarly falling levels of both
osteocalcin and P1NP — suggesting that athletes may be diverting energy from
bone formation to power the high-energy demands of their metabolism.
However, the runners also had higher P1NP levels at rest
compared to controls, suggesting that they may divert energy from bones during
racing but also have a net gain in bone health in the long-term. Running exerts
a higher physical load on bone than swimming or cycling, it could be that these
forces stimulate bone tissue to signal to the pancreas to help meet its energy
needs in the long-term, the researchers explained. ‘Our work has shown that
bones aren’t just lying idle, but are actively communicating with other organs
and tissues to drive the body’s energy needs,’ Lombardi said. The results of
the study were presented at the 2016 European Congress of Endocrinology in
Munich, Germany.
Source: www.thehealthsite.com
01.06.2016
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