Impact of time-of-day on judo-specific performance

Abstract

In judo tournaments, matches for each weight category are held on the same day and athletes competing at the finals have to compete at different times of the day. This study aimed to investigate the effect of time-of-day on judo specific performance and the changes in physiological load following judo specific performance. Fourteen male judo athletes (age 19.1±1.4 years) voluntarily participated in the study. At the 1st visit, anthropometrical measurements and familiarization procedures were conducted and the athletes’ chronotype was determined. Athletes performed the Special Judo Fitness Test (SJFT) during 2nd and 3rd visits. Athletes randomly performed two consecutive SJFTs with 15 min intervals at 10:00h, which is the official start time of matches, and at 18:00h which is the time when the finals start. During SJFT applications, athletes heart rate (HR), blood lactate (bLA), body temperature and rate of perceived exertion (RPE) were monitored. The changes in total throw numbers (F1, 13= 1.32, p=0.27) and SJFT index (F1, 13= 0.30, p=0.59) were not different between morning and evening. There were similar changes in bLA (F4, 52=0.66, p=0.63), RPE (F1, 13=1.42, p=0.26) and body temperature (F1.4, 18.0=1.18, p=0.31) which were measured before and after the tests. However, HR measured in the evening were higher compared to morning measurement at all measurement times (F1, 13=10.28, p=0.01), but there was no difference in SJFT throws (F3.8, 48.8=0.49, p=0.74). In conclusion, different times of the day did not affect judo specific performance as well as physiological variables in judo athletes.

Acute Effects of Two Different Concurrent Training Models on Physiological Parameters, Explosive Strenght and Balance Performance in Soccer Players

“…The participants' HR measurements were recorded at 5 and 10 minutes (39,25) of the active recovery period before and after training. Measurements were taken on the left arm with a Basic Comfort Plus brand electronic blood pressure monitor (24).…”

“…Blood Lactate (LA) Analysis: Blood lactate measurements of the participants before training and at 5 and 10 minutes of the active recovery period after training (39,25) were taken with the Edge brand (Brussel / Belgium) lactate kits and device. With blood lactate measurement; blood was taken from the fingertip and the blood lactate value in the blood was measured.…”

Diurnal variation in Uchikomi fitness test performance: Influence of warm-up protocols

“…The time of day is also a significant factor because of its connection to the diurnal variation, as well as the biochemical and hormonal responses to this pattern. As an example, judoka’s heart rate, blood lactate, body temperature and rate of perceived exertion seems to be significantly higher in the evening than in the morning ( Öztürk et al, 2022 ). In the other study, judoka’s muscle power and strength seems to be significantly higher in the afternoon than in the morning ( Chtourou et al, 2013 ).…”