Massimiliano Gollin

Movement analysis and metabolic profile of tennis match play: comparison between hard courts and clay courts

Abstract This study aimed to define the movement analysis and metabolic model in tennis on hard courts and clay courts. Twenty-four tennis players were equipped with a 15 Hz GPS and a Polar. H7 and played a match on each playing surface. The average duration of matches was 76 Å} 24 (C) and 69 Å} 17 min (H). The maximum heart rate (HRmax) was 185 Å} 14 (C) and 178 Å} 10 bpm (H), the average heart rate (HRav) was 144 Å} 14 (C) and 139 Å} 12 bpm (H). The average metabolic power (MPav) was 3.93 Å} .34 (C) and 3.70 Å} .34 W Å~ kg−1 (H) (ES = .72, C > H, +6%). The ANOVA and the post hoc showed significant differences regarding the considered parameters on both the surfaces. The t-test highlighted significant surface-related differences (ES = .88, C > H, +26%) concerning accelerations performed between 50 and 60% of the maximum value, decelerations between 40 and 50% of the maximum (ES = 1.28, H > C, +37%), metabolic power between 0 and 10 W Å~ kg−1 (ES = .71, H > C, +1%), and 10 and 20 W Å~ kg−1 (ES = .78, C > H, +15%).

Physical demand of wheelchair tennis match-play on hard courts and clay courts.

Abstract The aim of this study was to define the performance model of wheelchair tennis, by means of 20 Hz GPS together with heart rate monitors, while also investigating potential surface-related differences. Hence, 12 matches performed by 12 nationally ranked wheelchair tennis players were examined. Each athlete played one match on the clay and one on the hard court according to a counterbalanced design, and the data regarding the parameters of maximum heart rate (HRmax), average heart rate (HRav), maximum speed (SPmax), average speed (SPav), maximum acceleration (ACCmax), maximum deceleration (DECmax), maximum metabolic power (MPmax), average metabolic power (MPav) and energy expenditure (EE) were analysed. The average match duration was 82 ± 16 min on clay courts (C) and 68 ± 17 min on hard courts (H) (p = .06), while the distance covered is greater, but not significant, on clay courts (C > H, +10%). The t-test did not highlight significant differences pertaining to the playing surface. The linear regression showed significant values concerning the distance covered (C: p < .0001, r2 = .82, H: r2 = .81) and the energy expenditure (C: p < .05, r2 = .5, H: r2 = .9). The playing surface does not affect the performance of competitive wheelchair tennis athletes.

Esercizio fisico e salute psicologica in donne affette da Sclerosi Multipla: l’effetto di moderazione del livello di disabilità

Lo studio intende indagare gli effetti di un programma di attivita motoria sullo stato di salute psicologica dei soggetti con Sclerosi Multipla (SM), analizzando gli effetti diretti dell’esercizio fisico sulla qualita di vita (QdV) e sulla depressione, e gli effetti di moderazione del livello di disabilita nella relazione tra allenamento motorio e variabili psicologiche. Sono state coinvolte 31 donne affette da SM recidivante remittente, con un’eta media di 40 anni (DS = 5; min = 22; max = 50) e un livello di disabilita di 2.0 dell’Expanded Disability Status Scale (EDSS). I partecipanti allo studio sono stati suddivisi, secondo specifiche tecniche di appaiamento, in due gruppi (sperimentale, GS - controllo, GC), omogenei al baseline per le variabili di interesse. Il GS ha partecipato a 12 settimane di training motorio bisettimanale, basato su attivita aerobica ed esercizi di rinforzo muscolare; mentre il GC ha mantenuto inalterate le proprie abitudini. La partecipazione all’intervento motorio ha un’influenza positiva sui sintomi depressivi (p < .001) e sulla QdV (p < .001). Il livello di disabilita e risultato un moderatore della relazione tra partecipazione all’esercizio fisico e le variabili psicologiche.