Circadian Rhythm, Lung Function & Exercise

Exercise is best when coordinated with circadian rhythms, the body's biological 24-hour cycles, when lung function is strongest, a study says.

"Circadian rhythms regulate our biological cycles for sleep, activity level, metabolism, and many other processes through our body's exposure to sunlight and darkness," said study leader Dr. Boris I. Medarov, of Long Island Jewish Medical Center, in New Hyde Park, N.Y.

"Our study finds that lung function has its own rhythm that may govern how much energy we exert throughout the day and the best times to engage in certain activities."

The findings, presented at CHEST 2004, the 70th annual international scientific assembly of the American College of Chest Physicians, indicate patients' lung function was at its best in the late afternoon.

"We often associate the end of the work day with being tired and less motivated for physical exertion; however, lung function seems to be at its best during this time," Medarov said. "Engaging in other physical activities in the late afternoon may help us to achieve optimal performance."

by United Press International. 10/29/04

TIMING of Surgery/Chemo, etc.

Yet another study suggests its importance

Dr. William Hrushevsky
Mammo Density and Changes by Menstrual Cycle
Surgery and Monthly Cycle
Predictability of Monthly/Yearly Rhythms of Bca Features
Timing:Mastectomy & Oophorectomy
High Pre-Op Estrogen Does NOT Improve Survival
Impaired Body Clock Speeds Tumor Growth (Mice)
Fertility Cycle Influence on Surgical Breast Cancer Cure
Timing of Adjv Chemo: Menstrual Cycle, BCa
Normal Breast Lobular Arch & Menstrual Timing
Breast Ca Growth & Investigations of Adj Surgery: TIMING
Circadian Sensitivity toCyclophosphamide: Mice
Delays in Breast Ca Diag/ Trtmnt Rcil/Ethnc Grps

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