Skip to main content

Table 1 Characteristics of exercise-trained men

From: Effect of betaine supplementation on plasma nitrate/nitrite in exercise-trained men

Variable Study 1
N = 8
Study 2
N = 13
Study 3
N = 10
Age (yrs) 25 ± 6 23 ± 3 27 ± 5
Height (cm) 178 ± 6 178 ± 8 178 ± 3
Weight (kg) 86 ± 15 82 ± 12 81 ± 7
BMI (kg∙m-2) 27 ± 4 26 ± 4 26 ± 3
Body fat (%) 17 ± 5 15 ± 7 13 ± 6
Waist:Hip 0.81 ± 0.05 0.84 ± 0.04 0.82 ± 0.04
Resting heart rate (bpm) 66 ± 5 68 ± 5 62 ± 10
Resting SBP (mmHg) 117 ± 6 114 ± 11 111 ± 11
Resting DBP (mmHg) 74 ± 8 73 ± 9 61 ± 8
Years resistance exercise training 7 ± 8 4 ± 3 7 ± 6
Hours per week resistance exercise 4 ± 3 4 ± 1 4 ± 1
Years aerobic exercise training 4 ± 4 3 ± 3 5 ± 4
Hours per week aerobic exercise 2 ± 1 2 ± 2 2 ± 1
  1. Data are mean ± SD.
  2. Study 1: cross-over design with subjects consuming either 1.25 or 5.00 grams of betaine in a single ingestion.
  3. Study 2: cross-over design with subjects consuming 2.5 grams of betaine or a placebo daily for 14 days; 21 day washout period between each condition.
  4. Study 3: subjects consumed 6 grams of betaine daily for 7 days.