Safe Load Carrying After Uncomplicated Myocardial Infarction

Dressendorfer, Rudolph H.; Hollingsworth, V.; Franklin, Barry A.; DeWitt, Christopher; Timmis, Gerald C.

doi:10.1378/chest.109.3.821

Cited by 3 publications

(1 citation statement)

References 15 publications

(1 reference statement)

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“…(1989) recommended a load-carriage test similar to the one used in this study to be used for screening patients with coronary artery disease, instead of the static handgrip test recommended by Dressendorfer et al (1996). Wilke et al (1989) based their recommendation on the fact that whole-body O 2 and myocardial oxygen demand, as re¯ected by the RPP, was signi®cantly higher during the load-carriage test when compared with the hand-grip test at the same relative intensities.…”

Section: Physiological Responses During Load-carriage Walksmentioning

confidence: 99%

Gender differences during treadmill walking with graded loads: biomechanical and physiological comparisons

Bhambhani¹,

Maikala²

2000

Eur J Appl Physiol

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In this study, we compared the biomechanical and physiological responses of healthy men and women during bilateral load carriage while they walked on a treadmill at their self-selected velocity. Eleven men mean (SD) maximal oxygen uptake, [VO(2)(max) = 56.0 (7.1) ml x kg(-1) x min(-1)] and 11 women [VO(2)(max) = 44.6 (7.6) ml x kg(-1) x min(-1)] carried 15-kg and 20-kg loads in random order using a custom-designed load-carriage device. The load supported by each hand was measured by placing strain gauges in each handle of the device. The load supported by the body was calculated as the difference between the load carried and that supported by each hand. Physiological measurements were recorded using standard procedures, and cardiac output was measured by carbon dioxide rebreathing while standing, walking, and during load carriage. Three-way analysis of variance (gender by load by test phase) indicated no significant (P > 0.05) three-way interaction, implying that the overall trend in these responses was similar in men and women. A-priori Scheffe multiple comparisons revealed the following significant (P < 0.05) gender differences during load carriage: (1) women supported a lower proportion of the load with the hands and transferred a greater amount to the body by resting the load against the chest, (2) the oxygen uptake increased by a greater amount in the women compared with men and exceeded the ventilatory threshold during the 20-kg walk in women, and (3) the cardiovascular stress, as indicated by the percentage of maximal heart rate and rate pressure product (product of heart rate and systolic blood pressure), was significantly higher in women compared with men during both of the load-carriage walks. These observations suggest that when carrying absolute loads of 15 kg and 20 kg, women are more susceptible to fatigue and are at a greater risk of cardiovascular complications than men.

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Section: Physiological Responses During Load-carriage Walksmentioning

confidence: 99%

Gender differences during treadmill walking with graded loads: biomechanical and physiological comparisons

Bhambhani¹,

Maikala²

2000

Eur J Appl Physiol

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Resistance Training for Individuals With Cardiovascular Disease

Vincent

Vincent²

2006

Journal of Cardiopulmonary Rehabilitation

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Age-Related Decline in Handgrip Strength Differs According to Gender

Vianna¹,

Oliveira²,

Araújo³

2007

J Strength Cond Res

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It is well-established that at old age there is a significant decline in muscle strength. Reference values for muscle strength might be useful for assessment of muscle impairment and of physiological adaptations. However, it is still unclear whether gender affects the rate of decline. Therefore, the aim of this study is to investigate the effect of gender and age on handgrip strength and to establish reference values for this variable. Reviewing medical charts collected from 1994 to 2005, a convenience sample of 2,648 subjects (1,787 men and 861 women), aged between 18 and 90 years, was obtained. Our results show higher handgrip strength for men compared with women (36.8 +/- 0.20 vs. 21.0 +/- 0.18 kg; p < 0.001). The regression analysis with a quadratic model shows that aging accounts for 30% of the variance in handgrip strength (r(2) = 0.30; p < 0.001) in men and 28% (r(2) = 0.28; p < 0.001) in women. In addition, the bent linear regression with multiple regressors show that a faster decline in handgrip strength occurs at the age of 30 years for men and 50 years for women. We conclude that handgrip strength decline with age differs between genders, making useful the existence of distinct male and female normative age group data.

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Safe Load Carrying After Uncomplicated Myocardial Infarction

Cited by 3 publications

References 15 publications

Gender differences during treadmill walking with graded loads: biomechanical and physiological comparisons

Gender differences during treadmill walking with graded loads: biomechanical and physiological comparisons

Resistance Training for Individuals With Cardiovascular Disease

Age-Related Decline in Handgrip Strength Differs According to Gender

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