Table 3.
Muscle oxygenation of the vastus lateralis during a back squat exercise protocol for determination of power and velocity following acute and multiday nitrate supplementation.
| PL | BR | |||||||
|---|---|---|---|---|---|---|---|---|
| Day 1 | Day 4 | Day 1 | Day 4 | |||||
| Variable | Set 1 | Set 2 | Set 1 | Set 2 | Set 1 | Set 2 | Set 1 | Set 2 |
| Baseline (%) | 71 ± 11 | 72 ± 11 | 71 ± 13 | 70 ± 12 | 71 ± 13 | 73 ± 10 | 72 ± 14 | 73 ± 13 |
| TD (s) | 4.2 ± 2.6 | 4.5 ± 2.5 | 4.6 ± 2.5 | 3.9 ± 3.3 | 2.6 ± 2.1 | 3.0 ± 3.3 | 4.9 ± 3.6 | 3.9 ± 3.4 |
| Nadir during exercise | 65 ± 16 | 68 ± 15 | 63 ± 17 | 61 ± 16 | 58 ± 17 | 63 ± 15 | 66 ± 15 | 65 ± 16 |
| Nadir post-exercise | 24 ± 17 | 26 ± 19 | 29 ± 25 | 22 ± 23 | 21 ± 16 | 20 ± 18 | 24 ± 17 | 25 ± 19 |
| ΔSmO2 during exercise | −6 ± 11 | −4 ± 8 | −8 ± 9 | −9 ± 10 | −13 ± 14 | −11 ± 15 | −5 ± 8 | −8 ± 10 |
| ΔSmO2 total | −47 ± 13 | −46 ± 14 | −42 ± 20 | −48 ± 17 | −51 ± 15 | −53 ± 15 | −47 ± 17 | −48 ± 17 |
| Time to nadir post-exercise |
22 ± 5 | 21 ± 6 | 22 ± 7 | 22 ± 6 | 20 ± 5 | 19 ± 5 | 23 ± 7 | 21 ± 6 |
| Lag from end-exercise |
16 ± 5 | 15 ± 6 | 14 ± 7 | 15 ± 6 | 13 ± 5 | 13 ± 5 | 16 ± 5 | 14 ± 4 |
Δ = difference; BR = NO3−-rich beetroot juice; PL = NO3−-depleted beetroot juice; s = seconds; SmO2 = muscle oxygen saturation; TD = time delay.