Hernández LJE, Sierra GLM, Pichel PD

Language: Spanish
References: 17
Page: 261-267
PDF size: 170.02 Kb.

ABSTRACT

Introduction. The relation between heart rate and age during the exercise test is dependent on the altitude over the sea level in which the test is made. Objective. To observe the behavior of the heart rate during a maximal exercise test and its relation to age and to the altitude of Mexico City. Method. Observational, non randomized study of 1,853 healthy subjects who underwent maximal exercise test done with Bruce’s protocol, in the Department of Cardiology of the Spanish Hospital of Mexico City. Results. The distribution by age groups showed a normal curve. They were divided by gender (67% males and 33% females) with a mean age of 47.6 ± vs 49.6 ± 13.7 years respectively (p = 0.003). Maximal heart rate according to gender (167.9 ± 17.4 vs 160 ± 18.2 bpm, p = 0.001). Trained vs sedentary (85.7% vs 14.3%). Maximal heart rate by grade of training (169.1 ± 16.4 vs 167.6 ± 17.8 bpm, p › 0.05) and the lineal correlation of maximal heart rate dependent on age of the subject (r-0.61, Y = 204.37 + (-0.810*X), p = 0.001). Conclusions. The maximal heart rate during maximal exercise test at the altitude of Mexico City is lower than those reported in the literature. This is statistically significant and depends on age and it does not bear any relationship to the degree of training, at least in our subgroup of subjects studied. The same is true for females and the dependence on age remains the same too.

REFERENCES

1. Borg G, Hassmen P, Lagerstrom M: Perceived exertion related to heart rate and blood lactate during arm and leg exercise. Eur J Appl Physiol 1987; 56: 679-85.

2. Astrand P, Astrand I: Heart rate during muscular work in men exposed to prolonged hipoxia. J Appl Phisiol 1958; 13: 75-80.

3. Astrand I. Aerobic work capacity in men and women with special reference to age. Acta Phisiol Scand 1960; 49: 1-82.

4. Cunningham WL, Becker ES, Kreuzer F: Cathecolamines in plasma and urine at high altitudes. J Appl Phisiol 1965; 20: 610-706.

5. Hartley LH, Mason JW, Hogan RP, Jones LG, Kotchen TA, Mougey EH, et al: Multiple hormonal responses to graded exercise in relation to physical training. J Appl Physiol 1972; 33: 602-6.

6. Hartley LH, Mason JW, Hogan RP, Jones LG, Kotchen TA, Mougey EH, et al: Multiple hormonal responses to prolonged exercise in relation to physical training. J Appl Physiol 1972; 33: 607-10.

7. Hartley LH, Vogel JA, Cruz JC: Reduction of maximal exercise heart rate at altitude and its reversal with atropine. J Appl Physiol 1974; 36: 362-5.

8. Lester M, Sheffield LT, Trammell P, Reeves TJ: The effect of age and athletic training on the maximal heart rate during muscular exercise. Am Heart J 1968; 76: 370-6.

9. Sheffield LT, Maloof JA, Sawyer JA, Roitman D: Maximal heart rate and treadmill performance of healthy women in relation to age. Circulation 1978; 57: 79-84.

10. Ellstad MH: Stress Testing. Philadelphia F.A. Davis Company, 1980.

11. Chaitman BR: En Braunwald Heart Disease. Philadelphia WB. Saunders Company, 1997: 153-176.

12. Longhurst JC, Kelly AR, Gonyea WJ, Mitchell JH: Chronic training with static and dynamic exercise: cardiovascular adaptation, and response to exercise. Circ Res 1981; 48: I171-8.

13. Froelicher VF: Exercise and the Heart: Clinical Concepts. Chicago: Year Book Medical, 1987.

14. Detrano R, Froelicher VF: Exercise testing: uses and limitations considering recent studies. Prog Cardiovasc Dis 1988; 31: 173-204.

15. Fletcher GF, Froelicher VF, Hartley LH, Haskeil WL, Pollock ML: Exercise standards. A statement for health professionals from the American Heart Association. Circulation 1990; 82: 2286-2322.

16. Wei JY: Age and the cardiovascular system [see comments]. N Engl J Med 1992; 327: 1735-9.

17. Londeree BR, Moeschberger ML: Influence of age and other factors on maximal heart rate. J Cardiac Rehab 1984; 4: 44-49.