Furthermore, some evidence also indicates that the continuum as a repetition paradigm with high-load, low repetition at one end (strength stimulus) and a high repetition, low load at the other end. Indeed, the S-EC exists, particularly if work is equated as a high load low repetition scheme at one end (strength stimulus) and high volume (HIEE stimulus) at the other. Available evidence indicates the existence of the S-EC continuum from two aspects. Specificity has two major components: A strength-endurance continuum (S-EC) and adherence to principles of Dynamic Correspondence. Both efforts produced similar effects on skin temperature and did not affect jumping performance after exercise. In conclusion, Tsk decreased after both isometric and auxotonic effort at 70% of the maximal performance and recovered baseline values within 15 minutes of completion. Significant differences (p < 0.05) were found for the time of data collection on Tsk with similar pre- and post-15 minutes values. The main results indicated no significant differences for RPE (p = 0.486), CMJ vertical height (VH p = 0.344) and Tsk (p > 0.05) in any of the regions of interest after protocols. ![]() Additionally, infrared thermography data from twelve regions of interest of the lower limbs were registered before, immediately after and 15 minutes after finishing the effort. Rate of perceived exertion (RPE) and countermovement jumping performance (CMJ) were measured before and immediately after efforts. During the data collection, participants performed a specific standardized warm-up and then randomly performed 4x10 repetitions of auxotonic squat to 90° of knee flexion at 70% of 1RM and 4x10 seconds of isometric squat effort at 90° of knee flexion, at 70% of maximal isometric squat strength (both with a passive recovery of 90 seconds seated). Two types of protocols – isometric and auxotonic – were performed on different days, having previously calculated the maximal isometric squat strength and auxotonic 1RM. A total of 15 national level handball players voluntarily participated in the study (age: 23.20 ± 5.23 years). The aims of this study were (i) to determine the variations in skin temperature (Tsk) of the lower limbs after an effort of auxotonic and isometric squat contractions using infrared thermography and (ii) to study jumping performance variations in handball players after those two different contraction types. The Infrared Thermography (IRT) is being used in the field of sport as a means of quantifying the effects of workload. Practically, partial-squats may be beneficial for strength and power athletes during a strength-speed mesocycle while peaking for competition. Our findings suggest that partial ROM squats in conjunction with full ROM squats may be an effective training method for improving maximal strength and early force-time curve characteristics in males with previous strength training experience. These larger effect sizes in the FP group can likely be explained their ability to train at larger relative training intensities during the final 3 weeks of training resulting in superior training adaptations. There was a trend for FP to improve over F in 1-RM squat (+3.1%, d=0.53 vs. Additionally, the FP group achieved statistically larger relative training intensities (%1-RM) during the final three weeks of training (p<0.05). There was also a statistically significant time effect (p<0.05) for the 1-RM squat, 1-RM partial-squat, isometric squat peak force allometrically scaled (IPFa) 90°, IPFa 120° and impulse allometrically scaled at 50ms, 90 ms, 200 ms, and 250 ms at 90° and 120° of knee flexion. Repeated measures ANOVA revealed that there was a statistically significant group by time interaction for impulse scaled at 50 ms, 90 ms, and 250 ms at 90° of knee flexion and rate of force development at 200 ms with 120° of knee flexion (p<0.05). ![]() Seventeen recreationally trained males (1-RM Squat: 146.9 ± 22.4 kg) were assigned to two groups: full ROM squat (F) and full ROM with partial ROM squat (FP) for the 7-week training intervention. ![]() The purpose of our study was to examine the effects of two different training methods on dynamic and isometric measures of maximal strength.
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