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Cardiorespiratory Fitness Influences the Blood Pressure Response to Experimental Weight Gain
Version of Record online: 6 SEP 2012
2007 North American Association for the Study of Obesity (NAASO)
Volume 15, Issue 12, pages 3005–3012, December 2007
How to Cite
Gentile, C. L., Orr, J. S., Davy, B. M. and Davy, K. P. (2007), Cardiorespiratory Fitness Influences the Blood Pressure Response to Experimental Weight Gain. Obesity, 15: 3005–3012. doi: 10.1038/oby.2007.358
- Issue online: 6 SEP 2012
- Version of Record online: 6 SEP 2012
- Received for review November 15, 2006, Accepted in final from April 21, 2007
- blood pressure;
- clinical research;
- weight gain
Objective: We tested the hypothesis that with similar weight gain the increase in blood pressure (BP) would be smaller in men with higher cardiorespiratory fitness (HCRF) than in men with lower cardiorespiratory fitness (LCRF).
Research Methods and Procedures: Thirteen men (age = 23 ± 1, BMI = 24 ± 1) were overfed by ∼1000 kcal/d over ∼8 weeks to achieve a 5-kg weight gain. Resting BP and 24-hour ambulatory BP, body composition, and fat distribution were measured.
Results: Cardiorespiratory fitness (CRF) was higher in the HCRF group compared with the LCRF group (49.9 ± 1.2 vs. 38.1 ± 1.4 mL/kg per minute, p < 0.001). At baseline, body weight was similar in the HCRF and LCRF groups, whereas the HCRF group displayed lower levels of total body fat (13.0 ± 1.7 vs. 16.9 ± 1.3 kg, p = 0.049) and abdominal visceral fat (49 ± 6 vs. 80 ± 14 cm2, p = 0.032). Resting BP and 24-hour ambulatory BP were similar in the two groups at baseline. After weight gain, body weight increased ∼5 kg (p < 0.05) in both groups; the changes in body composition and regional fat distribution were similar. As hypothesized, the increases in resting systolic (1 ± 2 vs. 7 ± 2 mm Hg; p = 0.008) and diastolic (−1 ± 4 vs. 5 ± 1 mm Hg; p = 0.005) BP were smaller in the HCRF group. CRF was correlated with the increases in resting systolic (r = −0.64; p = 0.009) and diastolic BP (r = −0.80; p < 0.001). Furthermore, the relationship between CRF and BP remained significant after adjusting for the changes in the proportion of total abdominal fat gained as visceral fat.
Discussion: These findings suggest that higher levels of CRF are associated with a smaller increase in BP with weight gain, independently of changes in abdominal visceral fat.