Effects of Wearing a Helmet on Thermal Balance While Cycling in the Heat.

In brief: Many cyclists refuse to wear helmets because they produce discomfort and drag. To determine the effects of wearing a helmet on thermal balance and rating of perceived exertion while cycling in the heat, six male competitive cyclists aged 19 to 32 rode a stationary bicycle attached to a road-racing simulator in an environmentally controlled chamber for two hours at 70% V O2 max. Measurements were taken of rectal and skin temperatures, V O2, heart rate, sweat rate, and rating of perceived exertion.

Effect of sugar mill effluent on oxygen uptake and carbon dioxide output of rice (Oryza sativa L.c.v. Mushoori) seedlings.

The effects of a sugar mill effluent on respiration of rice (Oryza sativa L.c.v.