Table 2.
Integrated MSNA and action potential responses to SHG and PECO
| Static Handgrip |
PECO | |||||
|---|---|---|---|---|---|---|
| HG1 | HG2 | HG3 | HG4 | HG5 | ||
| Integrated MSNA | ||||||
| ΔBF, bursts/min | 0 ± 5 | 5 ± 6 | 9 ± 5* | 12 ± 6* | 14 ± 8* | 8 ± 9* |
| ΔBI, bursts/100 heartbeats | −3 ± 6 | 2 ± 6 | 7 ± 5* | 9 ± 7* | 10 ± 10* | 9 ± 12* |
| ΔBA, AU | 1 ± 7 | 8 ± 3 | 9 ± 7 | 12 ± 8* | 23 ± 8* | 15 ± 8* |
| ΔTotal MSNA, AU/min | 64 ± 248 | 412 ± 407* | 724 ± 496* | 948 ± 489* | 1,407 ± 786* | 814 ± 646* |
| AP indexes | ||||||
| ΔAPs/min | 44 ± 92 | 139 ± 187* | 197 ± 201* | 252 ± 203* | 318 ± 215* | 195 ± 296* |
| ΔAPs/burst | 1 ± 1 | 2 ± 2 | 3 ± 3 | 4 ± 2* | 6 ± 4* | 4 ± 4* |
| ΔClusters/burst | 0.7 ± 0.4 | 0.8 ± 0.7 | 1.2 ± 0.8 | 1.4 ± 0.7* | 1.9 ± 1.3* | 1.3 ± 1.0* |
| ΔTotal clusters | 0 ± 3 | 1 ± 3 | 2 ± 4 | 5 ± 5* | 6 ± 3* | 7 ± 5* |
Values are means ± SD. MSNA, muscle sympathetic nerve activity; SHG, static handgrip; PECO, postexercise circulatory occlusion; HG, handgrip; BF, burst frequency; BI, burst incidence; BA, burst amplitude; AU, arbitrary units; AP, action potential.
*
P < 0.05, significantly different from baseline.