The study examined whether swimming velocity (SV) obtained from ten-minutes swimming test (T-10) had validity as the endurance training intensity. A total of nine highly-trained male college swimmers (19.4±1.1yrs) volunteered as subjects in this study. In the first place, two kinds of field tests (T-10 and T-30) were carried out, which were followed by two kinds of interval training tests in which the subjects swam 200m ten times. A pacemaker set at the bottom of a 50m swimming pool controlled the SV during the tests. Blood lactate concentration (BLa) and heart rate (HR) were measured to evaluate exercise intensities. The SV and BLa from the T-10 (1.437±0.055 m/s, 9.47±2.31mmol/l) were significantly higher than those from the T-30 (1.362±0.069 m/s, 5.33±1.58 mmol/l)(p<0.05). One of the interval training tests, conducted at the SV obtained by the T-10, resulted in the SV of 1.436±0.060m/s, the BLa of 5.82±2.00 mmol/l, and the HR of 182.1±8.6 bpm. And the other one, conducted at the SV obtained by the T-30, resulted in the SV of 1.368±0.064m/s, the BLa of 2.33±0.65 mmol/l, and the HR of 168.3±12.1 bpm. The differences observed in those tests were statistically significant (p<0.05). These results suggest that the SV obtained from T-10 can provide sufficient stimulation to develop swimmers' endurance capacity. Consequently, T-10 is considered to be an effective field test to set the swim-training pace.

DESCENTE SPORTS SCIENCE Vol.21/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE