1,720,973 research outputs found
RSA response to preseason training in semiprofessional soccer players
No full textAbstract This study has investigated the effect of 8 weeks of preseason training on the repeated sprinting ability (RSA) in semiprofessional soccer players (SPSP). An RSA test, consisting of 7 9 30 m sprint with 25 s active rest, was administered to 12 SPSP (age 23 ± 6 years) pre- and post-8 weeks of preseason soccer training. Preseasonal training consisting of aerobic sessions (high-intensity intermittent training) was provided three times a week on alternate days with the strength training sessions (basic and functional strength training) and sprint training drills. Analysis of variance for repeated measures was conducted to assess differences (p.05) in RSA test and fatigue index with time (i.e., pre-post) as within factor. Multivariate analysis of variance, with the seven repeated sprint tests as dependent variables and time (i.e. pre-post) as within factor, was conducted to test differences in sprint performance over the time. The main effect (p.001) was found before (pre-) and after (post-) the preseasonal training in global RSA performance;
conversely, no statistical differences were found between fatigue index values. An overall significant effect was found for the seven sprints performed pre- and post. Univariate
analysis shows that each sprint time was significantly (p.001) lower in the pre- than in the post-RSA tests. This study provides useful information for the coach to understanding the training process of SPSP and to maximize the best physical condition of the whole team
Age-Related changes in Upper Body Strength of Italian Firefighters
No full textConsidering that the decrease in strength can be observedwith aging and that muscular endurance and strength are essential factors for firefighting effectiveness in critical situations (Michaelides et al. 2008), the aim of this studywas to evaluate theUpper Body (UBS) and Grip (GS) Strength of Italian Firefighters and to compare the results in relation to the age. Bench press (1RM, kg) and Maximal peak grip strength (MPGS, N) were used to analysed 185 firefighters (age: 38 ± 8 yr; height: 1.77 ± 0.06 cm, weight: 76.6 ± 8.6 kg, BMI: 24.2 ± 2.2 kg m.2). Analysis of Variance (ANOVA) was applied to anthropometric and physical fitness values to assess significant difference (p.05) between age groups: B30 yrs, 31–35 yrs, 36–40 yrs, 41–45 yrs, and [45 yrs. When a significant effect was found, post hoc Fisher protected least significant difference were used. Anthropometric values showed differences among ages groups for height and BMI. Despite 1RM showed significant differences among age group (F(4.178) = 6.96; p.001), no statistical differences emerged between age group in MPGS values. In particular, 1RM showed no difference between yr 31–35 age groups and significant a decrease in 36–40 yr group. A decrease of 14 % in 1RM was reached betweenyrs and[45yrs. The results of this study could provide useful information
to development appropriate UBS conditioning programs to increase the job performance and decrease the percentage of risks due
to increased age in firefighters. With the knowledge of the limiting factors of age in strength performance of firefighters, the strength and conditioning firefighters instructor can more effectively tailor the training so that a job performance increase can be achieved in safety
Psychophysiological responses of firefighters to emergencies: a review
No full textFirefighters perform strenuous muscular works in hazardous environments and chaotic conditions, under time pressure and psychological stress. Various have shown high values of oxygen uptake, heart rate, blood lactate concentrations and salivary cortisol and A-Amylase in laboratory test, in real-life and simulated interventions. These high values have been attributed to the combined effect of the metabolically active muscle, thermoregulatory strain and fatigue resulting from the protective gear and a self-contained breathing apparatus in addition to further supplementary overweight (i.e., lifting weights, rescuing victims). In order to protect health and safety of firefighters and victims during emergencies, high levels of cardiovascular endurance and strength in firefighters are strongly recommended. In fact, high levels of physical fitness showed to increase firefighters’ work ability, their safety and decreased risk of injury
Physical Fitness Profile of Professional Italian Firefighters: differences between age-group
No full text
Do Italian Fire- Fighting Recruits Have an Adequate Physical Fitness Profile for Fire Fighting?
No full textAbstract The aim of this study was to evaluate the fitness level of Italian male recruits with (volunteers) and without (novices) previous fire-fighting experience. Strength (handgrip; 1RM bench-press), power (counter movement jump (CMJ)), velocity (20 m) and endurance (with and without self-contained breathing apparatus (SCBA)) performances of 29 volunteer (age: 22±3 years; BMI: 23±2) and 51 novice (age 30±5 years; BMI 25±2) fire-fighting recruits were compared (p<0.05). Volunteers showed better performances (p<0.01) for 1RM (80.5±16.5 kg), CMJ (31.4±4.8 cm) and 20 m (3.1±0.2 s) than novices (1RM=68.3±10.5 kg; CMJ=28.0±4.5 cm; 20 m=3.2±0.2 s). No difference emerged for handgrip (481.7±71.4 N) and VO2max with (42.9±5.2 ml/kg/min) and without (54.7±6.2 ml/kg/min) SCBA. Wearing the SCBA, 3% of volunteers and 16% of novices failed to complete the endurance test. Considering that fire fighters perform their job wearing SCBA, it could be advisable to test the fitness level of recruits in this condition
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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