My thesis is available for download

My thesis intitled "RELATIONSHIP BETWEEN CHANGES IN AEROBIC AND ANAEROBIC FITNESS WITH INTERNAL TRAINING LOAD METRICS DURING THE PRESEASON IN PROFESSIONAL MALE FUTSAL PLAYERS" is avaiable for download here

Abstract

Introduction

Futsal is a high intensity, multidirectional team sport involving considerable demand of aerobic and anaerobic metabolism. 

In futsal, athletes are subjected to similar training routines, but it is unknown if the external and internal loads are similar, and whether an association exists between training loads and physical fitness. 

Objectives

This study aimed to analyze changes in aerobic fitness, repeated sprint ability (RSA), and lower limb power (LLP) before and after a preseason, and possible relationships with internal training loads (ITL). The Futsal Intermittent Endurance Test (FIET), repeated sprint ability test (RSAT), squat jump (SJ), and Countermovement Jump (CMJ) were performed before and after pre-season. 

Methods

An Incremental Treadmill Test (ITT) with ergo spirometry was performed before the pre-season. Over eight weeks of training, the Overall Session Rate of Perceived Exertion (SRPE), Leg-muscular Session Rate of Perceived Exertion (SRPEmus), Central-respiratory Session Rate of Perceived Exertion (SRPEres)], two Training Impulse (TRIMP) [Banister's Training Impulse (TRIMP-B) and Edwards' Training Impulse (TRIMP-ED)] models and time above 90 % of Maximal Heart Rate (TZ5) were monitored as high-intensity activity indices. 

In the first study, the relationship between percentage changes in Peak Velocity in the Futsal Intermittent Endurance Test (PVFIET), variables of the RSAT, SJ, and CMJ, and indicators of Internal Training Load (ITL) accumulated during a futsal pre-season were investigated. 

In the second study, the relationship between the initial aerobic fitness indices, lower limb power, and capacity for repeated sprints and ITL during the initial pre-season phase was verified. 

In the third study, the possible relationships between ITL and TZ5 metrics during the pre-season were investigated. 

Results

In Study 1, the change (%) in PVFIET showed a high correlation with accumulated TRIMP-B, TRIMPED, and TZ5. 

In study 2, PVFIET, Maximal Oxygen Uptake (VO2max), and its associated velocity (vVO2max) showed positive correlations with TZ5 and TRIMP-B.Velocity at Ventilatory Threshold 1 (VT1) showed a high positive correlation with TRIMP-B, and Velocity at Ventilatory Threshold 2 (VT2) was associated with SRPEres and TZ5. 

In Study 3, SRPE and SRPEres showed high correlations with TRIMP-B and TRIMP-ED. TZ5 positively correlated with TRIMP-B and TRIMP-ED. SRPEmus showed a moderate correlation with TRIMP-B and TRIMP-ED scores. Near-perfect correlations were found between the TRIMP-B and TRIMPED. 

Conclusions

In summary, we propose that TRIMP-B, TRIMP-ED, and TZ5 can effectively predict improvements in the aerobic fitness of futsal players. Athletes with superior aerobic fitness and higher RSA values engage in greater levels of ITL and can sustain higher intensity for longer durations during the preseason. Although SRPE, SRPE mus, and SRPE res are appropriate measures for monitoring ITL in futsal training sessions, they do not effectively distinguish highintensity activity. Conversely, TRIMP-B and TRIMP-ED are metricsthat can accurately predict high-intensity activity.

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