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Cardiac rehabilitation had more power if more than 20 nanograms of vitamin D – April 2015

Ann Phys Rehabil Med. 2016 Apr 7. pii: S1877-0657(16)00039-7. doi: 10.1016/j.rehab.2016.01.012. [Epub ahead of print]
Ucay O1, Pouche M1, Guiraud T2, Besnier F2, Pathak A3, Labrunee M4.

Power max watts vs vitamin D High: > 20ng, Low: <20ng

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Good description of study at Vitamin D Council
Pmax: stationary bike start at 20 W resistance and increase 10 W every minute until max.

Vitamin D deficiency is a frequent pathology associated with cardiovascular diseases and physical performance.
To study the link between 25-hydroxyvitamin D (25OHD) level and physical performance and gain in physical performance after cardiovascular rehabilitation (CVR) with vitamin D deficiency.
25OHD level was assessed in a retrospective cohort of patients admitted for CVR. Data were collected on physical fitness [6-min walk test distance (6MWD) in percentage of predicted, maximal power (Pmax)]. The threshold of vitamin D deficiency was 20ng/ml chosen according to the literature.
Among the 131 patients included, as compared with those with nondeficiency (n=83; 63%), patients with vitamin D deficiency (n=48, 37%) had lower initial 6MWD (82±18 vs 89±12% predicted, P=0.009) and Pmax (100±58 vs 120±39W, P=0.006). After CVR, this difference was maintained. The improvement in 6MWD and Pmax was significantly lower with deficiency than nondeficiency, for an increase of 11±8% versus 14±9% predicted (P=0.048) and 10±30 versus 32±30W (P=0.00001), respectively.
Vitamin D deficiency may be associated with impaired physical fitness before CVR and a smaller gain in physical fitness with CVR, probably related to the action of vitamin D on the muscle.

PMID: 27067287

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