Abstract
PURPOSE: The aim of the study was to compare the blood pressure responses during cycle ergometry and a cold pressor test in a group of overweight (OW) and non-overweight (NO) children and adolescents.
METHODS: Twelve overweight (> 85th percentile for BMI for age and gender) children and adolescents, 7M and 5F (Age: 11.5 ± 1.7 years, Stature: 161 ± 12 cm and Body Mass: 69.3 ± 24.1 kg) and five non-overweight children (2M and 3F) volunteered for the study (Age: 12.6 ± 1.9 years, Stature: 160 ± 10 cm and Body Mass: 45.8 ± 14.0 kg). With the subjects in a seated position, beat-to-beat blood pressure was recorded using finger plethysmography for 2-min prior to the onset of the tests (RST). All subjects first underwent a cold pressor (CP) test (arm immersed up to the wrist in cold water at 10°C for two minutes). Early (ECP) pressor responses were defined as blood pressure data obtained in the first 30s and late (LCP) pressor responses were defined as the blood pressure response in the last 30s of the test. Following the CP test all subjects underwent two submaximal exercise stages on the cycle ergometer (3 min unloaded (UL) and 5 min at 50W). Compliance (C), mean blood pressure (MBP), total peripheral resistance (TPR), systolic blood pressure (SBP) and diastolic blood pressure (DBP) were measured.
RESULTS: A significant (P<0.05) group effect for DBP was identified for the CP test at RST (OW: 75 ± 6 mmHg vs. NO: 68 ± 7 mmHg), ECP (OW: 78 ± 8 mmHg vs. NO: 71 ± 8 mmHg) and LCP (OW: 87 ± 9 mmHg vs. NO: 82 ± 9 mmHg). Furthermore, a significant (P<0.05) main effect for group was also identified for DBP during the cycle ergometer test at RST (OW: 75 ± 6 mmHg vs. NO: 68 ± 7 mmHg) UL (OW: 77 ± 5 mmHg vs. NO: 70 ± 5 mmHg) and 50W (OW: 83 ± 7 mmHg vs. NO: 79 ± 8 mmHg). After co-varying for RST, the main effect for group was abolished during cycle ergometry. There were no significant main effects for group or interaction effects for C, MBP, TPR and SBP.
CONCLUSION: The higher DBP responses during exercise were a function of the higher resting DBP and may be an early indicator of cardiovascular dysfunction in obese individuals.
METHODS: Twelve overweight (> 85th percentile for BMI for age and gender) children and adolescents, 7M and 5F (Age: 11.5 ± 1.7 years, Stature: 161 ± 12 cm and Body Mass: 69.3 ± 24.1 kg) and five non-overweight children (2M and 3F) volunteered for the study (Age: 12.6 ± 1.9 years, Stature: 160 ± 10 cm and Body Mass: 45.8 ± 14.0 kg). With the subjects in a seated position, beat-to-beat blood pressure was recorded using finger plethysmography for 2-min prior to the onset of the tests (RST). All subjects first underwent a cold pressor (CP) test (arm immersed up to the wrist in cold water at 10°C for two minutes). Early (ECP) pressor responses were defined as blood pressure data obtained in the first 30s and late (LCP) pressor responses were defined as the blood pressure response in the last 30s of the test. Following the CP test all subjects underwent two submaximal exercise stages on the cycle ergometer (3 min unloaded (UL) and 5 min at 50W). Compliance (C), mean blood pressure (MBP), total peripheral resistance (TPR), systolic blood pressure (SBP) and diastolic blood pressure (DBP) were measured.
RESULTS: A significant (P<0.05) group effect for DBP was identified for the CP test at RST (OW: 75 ± 6 mmHg vs. NO: 68 ± 7 mmHg), ECP (OW: 78 ± 8 mmHg vs. NO: 71 ± 8 mmHg) and LCP (OW: 87 ± 9 mmHg vs. NO: 82 ± 9 mmHg). Furthermore, a significant (P<0.05) main effect for group was also identified for DBP during the cycle ergometer test at RST (OW: 75 ± 6 mmHg vs. NO: 68 ± 7 mmHg) UL (OW: 77 ± 5 mmHg vs. NO: 70 ± 5 mmHg) and 50W (OW: 83 ± 7 mmHg vs. NO: 79 ± 8 mmHg). After co-varying for RST, the main effect for group was abolished during cycle ergometry. There were no significant main effects for group or interaction effects for C, MBP, TPR and SBP.
CONCLUSION: The higher DBP responses during exercise were a function of the higher resting DBP and may be an early indicator of cardiovascular dysfunction in obese individuals.
| Original language | English |
|---|---|
| Article number | 1254 |
| Pages (from-to) | S167-S167 |
| Number of pages | 1 |
| Journal | Medicine & Science in Sports & Exercise |
| Volume | 39 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - May 2007 |
| Externally published | Yes |