Sprint interval cycling training (SIT) is an efficient means of improving anaerobic capacity of elite cyclist. However the effect of SIT can be affected by the riding intensity due to the different
programs of training session.We compared the effect of two different types of sprint interval cycling session on anaerobic capacity and blood buffer capacity.
Firstly fourteen male trained cyclists followed the same track training (TT) programs for six weeks, then were assigned into the constant number of riding times (CG=7) and decreased number of riding
times (DG=7) groups with paired design. Two sessions of track speed endurance training of every week were replaced by SIT in the following six weeks. One session included four sets of twenty times’
riding on Wattbike pro cycle ergometer (UK) totally. The riding number of CG group was constant (5+5+5+5 in four sets) and DG group was decreased (8+6+4+2 in four sets). The riding and intermittent
time were 20s and 10s respectively and cadence should keep 115rpm above. There is thirty minutes of rest between two sets. The repeated sprint test (RST), 1kilometer time trial (1kmTT) and blood gas
analysis during 1kmTT were performed before and after TT, and after 6-Week’s SIT respectively. Blood buffer capacity was calculated by blood gas indexes and BLa.
(1) DG’s mean power and total work of four riding sets in a SIT session were obvious higher than CG by 28.3% and 15.6% respectively. (2) Compared with the test before TT, we didn’t observe significant
changes in RST and 1kmTT after the six-week’s track training. After SIT, only DG’s mean peak power of RST increased by 8.1% (from 18.6±0.6 to 20.4±0.4 W/kg). In addition, CG and DG’s total work of RST
increased by 6.6% and 7.1% significantly, and [K+] of plasma at the end of RST also declined by 10% and 8% apparently. Meanwhile, both groups’ maximal power in the 1kmTT didn’t change, but only DG’s
mean power increased 6.1% (from 7.36±0.30 to 7.81±0.18 W/kg). Both group’s BLa recovery rate improved apparently, and DG was higher than CG by 31.9%. So only DG’s results of 1kmTT improved by 3.3%
(from 65.8±2.40 to 63.6±1.76 sec). (3) In the 1kmTT after SIT, both group’s BLa at the 5th minute after 1kmTT improved a little. Blood total buffer capacity of CG and DG increased significantly, but
the bicarbonate buffer capacity of blood didn’t change.
Six-week’s SIT can improve the repeated sprint ability and the performance of 1kmTT through increased glycolysis and quickening BLa clearance. The SIT of decreased riding times program should be more
effective than constant one to improve the peak power in RST and the power endurance in 1kmTT. The higher training intensity that the cyclists completed in twelve SIT sessions of decreased number of
riding times may be the main reason.