Physiological Factors Affecting Lifting Capacity in Women.
H.E.W. Annual Report 1979, 1979:64 pages
The results of a 2 year study on the factors that cause fatigue in women during static intermittent exercise are presented. Graphic and tabulated data on anthropometric statistics, strength and maximum voluntary contraction measurements, electromyographic recording results for lifts of various weights, and endurance of intermittent contractions of various percentages of maximum voluntary contraction, is provided for the 10 test subjects. Maximum oxygen uptake values, heart rate responses, and respiratory response data also are included. The authors conclude that similarities exist between physiological responses to intermittent isometric contraction and box lifting tasks. Fatigue can be avoided if relaxation periods are equal in duration to isometric contraction periods, and if the work rate is no greater than 40 percent of maximum oxygen uptake. Fatigue is induced within the contractile mechanism during isometric contractions that do not permit local blood flow.
NIOSH-Contract; Contract-210-77-0044; Long-term-study; Physiology; Fatigue; Hoisting-equipment; NIOSH-Publication; Anthropometry; Cardiovascular-system;
NTIS Accession No.
H.E.W. Annual Report 1979, 64 pages