Oxygen uptake kinetics and speed-time correlates of modified 3-minute all-out shuttle running in soccer players

Abstract

How parameters derived from oxygen uptake kinetics relate to critical speed is not fully understood, and how such parameters relate to more sport-specific performances, such as shuttle running, has not been investigated. Therefore, the primary aims of the present student were to examine the kinetics during all-out linear and shuttle running and compare physiological variables of all-out running to variables measured during a graded exercise test (GXT). Fifteen male soccer players performed a graded exercise test (GXT) and the kinetics from a series of three different 3-min all-out tests (3MT’s) were evaluated. achieved during the GXT did not differ from maximal achieved during the all-out tests (F = 1.85, p = 0.13) (overall ICC = 0.65; typical error = 2.48 ml∙kg-1∙min-1; coefficient of variation = 4.8%). A moderate, inverse correlation (r = -0.62, p = 0.02) was observed between τ (14.7 ± 1.92 s) and CS (3.96 ± 0.52 m∙s-1) despite the narrow SD for τ. No differences (p > 0.05) were observed for any of the kinetics between continuous and shuttle running bouts. The linear running 3MT (r3MT) represents a viable surrogate to the GXT and data beyond CS and D’ may be gleaned by using the bi-exponential speed-time model.

Is a verification phase useful for confirming maximal oxygen uptake in apparently healthy adults? A systematic review and meta-analysis

“…The most common criterion used in the reviewed studies is that the highest VO 2 observed in the verification phase should not exceed 3% of the highest VO 2 obtained in the CPET. This threshold can be justified by the technical error of measurement and intra-individual biological variation associated with the determination of VO 2max [ 15 , 56 , 57 , 62 , 63 , 69 , 71 , 78 , 82 , 86 , 89 – 91 , 95 , 107 , 108 , 113 , 116 , 120 – 122 ]. The more restrictive value of ≤ 2% [ 97 , 110 ] and the less restrictive values of ≤ 5–5.5% [ 104 – 106 , 111 ] may also be appropriate for single or different-day variability.…”

Bi-exponential modeling derives novel parameters for the critical speed concept

“…Moreover, because the linear AOT is already used regularly for the evaluation of aerobic fitness (Kramer et al. ) and the derivation of CS and D′ parameters, it is pertinent to note that the bi‐exponential model presented provides additional information that can be captured and tracked longitudinally; thereby, complementing an already robust assessment method.…”

Optimization of the Critical Speed Concept for Tactical Professionals: A Brief Review

“…The shuttle-running 3MT could add to the capability of testing tactical professionals. The shuttle-running test was designed and validated for sports athletes such as soccer, ice hockey, rugby, and basketball [ 32 , 44 ]. Commonly, athletes perform acceleration, deacceleration, and direction changes at high intensity.…”