Biomedical subjects

M Farrally

Publications and source records attributed to M Farrally.

3 recordsLinked to original sources

PubMed1993

Ventilatory threshold, heart rate deflection point and middle distance running performance.

Physiological measures of performance capacity have traditionally centered around the measurement of maximal oxygen uptake (VO2max). This study examined the relationship between maximal and submaximal laboratory measures of performance and running times within a group of trained middle distance runners. Analysis of the data obtained from 10 male and 2 female athletes identified the running velocity corresponding to the Ventilatory Threshold [(VT) (mean +/- SD = 15.3 +/- 2.36 km.h-1. treadmill speed)] as the major correlate with 3000 m (r = -0.984, n = 12) running performance. Treadmill speed corresponding with the heart rate deflection point [(Vd) (mean +/- SD = 16.75 +/- 2.38)] and the VO2max (mean +/- SD = 55 +/- 6 ml.kg-1.min-1) was also highly correlated (r = 0.94 and r = 0.82 respectively, n = 12) with 3000 m running performance. The running velocity corresponding with VT alone explained 96.3% of the variance in 3000 m performance time. The addition of VO2max and Vd using multiple regression analysis did not further improve significantly the predictive value of the physiological measures. The results of this study support the laboratory estimation of physiological measures such as Vd and VT in the assessment of middle distance running performance.

Adult↗

PubMed1991

Recording soccer players' heart rates during matches.

The aim of this study was to examine the possibility of obtaining information about the heart rate and physiological load imposed on soccer players during a game. The study was conducted on 27 soccer players, 9 each from semi-professional, university and recreational soccer teams. Players from all positions (attack, midfield and defence) were selected for the study. Each subject's heart rate was monitored during a match using a short-range radio telemetry (Sport Tester PE3000), and was sampled at 5-s intervals. The results indicate that it is possible to monitor successfully the heart rate of players with such equipment. The mean heart rate and standard deviation for each player during match play were: semi-professional players (172 +/- 12, 176 +/- 9 and 166 +/- 15 for forwards, midfielders and defenders, respectively); university players (171 +/- 13, 173 +/- 10 and 156 +/- 13 for forwards, midfielders and defenders, respectively); and recreational players (173 +/- 13, 170 +/- 12 and 162 +/- 13 for forwards, midfielders and defenders, respectively). Analysis by playing position revealed that midfield and forward players has a greater mean heart rate during a game than defensive players. To examine the suitability and accuracy of the two methods of obtaining objective data on heart rate, comparisons were made between the Sport Tester PE3000 and a standard electrocardiograph (ECG) telemetry technique. The results show that both techniques produce similar results; the former was the more convenient.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

PubMed1991

A computer-video aided time motion analysis technique for match analysis.

The purpose of this study was to find out suitable methods for obtaining objective data on the time spent by players of different positions during walking, jogging, cruising, sprinting and standing still during match play activities. Computer programs and filming analyses with a simple notation system based upon symbolic representations of movements have been devised for analysis of individual players' behaviour. A technique was devised and employed with a small group of university players, aged 19-21 years of age. The subjects were filmed in several matches, and the video recordings were analysed using a microcomputer. The ratio of the time spent for the players were 56% walking, 30% jogging, 4% cruising, 3% sprinting and 7% standing still. ANOVA revealed that there are significant differences among the players for different positions on the field, for example the time spent on walking, jogging and standing still differed (P less than 0.05) among attackers, defenders and midfielders. A new method has been developed to obtain reliable information about the players' movement and performance in the game. The Authors believe that there should be further studies carried out involving more teams at different levels of performance to substantiate these preliminary findings.

Adult↗