Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| Reference | Effect | Effective | Duration of tennisplay (minutes) |
|---|---|---|---|
| 12 | Improved stroke quality | Yes | 120 |
| 30 | Improved stroke quality | No | 120 |
| 14 | Improved tennis specific running speed, but had no effect on games won or hitting accuracy | Yes and no | 240 (with 30 min break at 120 min) |
| 11 | No performance benefit | No | 180 |
