| 摘要 |
The invention relates to a physical training device which enables a user to simulate high-altitude training conditions. The device includes a portable element (1, 9) through which the air inhaled and exhaled by the user passes, and additionally includes an air-passage element (3, 4, 5, 11) which limits, in a controlled manner, the amount of air that passes through the portable element (1, 9). |
