Dietary and Performance Assessment of Elite Soccer Players during a Period of Intense Training

1998 ◽  
Vol 8 (3) ◽  
pp. 230-240 ◽  
Author(s):  
JesÚs Rico-Sanz ◽  
Walter R. Frontera ◽  
Paul A. Molé ◽  
Miguel A. Rivera ◽  
Anita Rivera-Brown ◽  
...  
Keyword(s):  
Body Fat ◽  
Performance Status ◽  
Glycogen Storage ◽  
Dietary Guidelines ◽  
Soccer Players ◽  
Knee Extensors ◽  
Specific Test ◽  
Time To Completion ◽  
Intense Training ◽  
And Performance

This study examined the nutritional and performance status of elite soccer players during intense training. Eight male players (age 17 ± 2 years) of the Puerto Rican Olympic Team recorded daily activities and food intake over 12 days. Daily energy expenditure was 3,833 ± 571 (SD) kcal, and energy intake was 3,952 ± 1,071 kcal, of which 53.2 ± 6.2% (8.3 g ⋅ kg BW−1) was from carbohydrates (CHO), 32.4 ± 4.0% from fat, and 14.4 ± 2.3% from protein. With the exception of calcium, all micronutrients examined were in accordance with dietary guidelines. Body fat was 7.6 ± 1.1% of body weight. Time to completion of three runs of the soccer-specific test was 37.65 ± 0.62 s, and peak torques of the knee flexors and extensors at 60° ⋅ s−1 were 139 ± 6 and 225 ± 9 N ⋅ m, respectively. Players' absolute amounts of CHO seemed to be above the minimum recommended intake to maximize glycogen storage, but calcium intakes were below recommended. Their body fat was unremarkable, and they had a comparatively good capacity to endure repeated bouts of intense soccer-specific exercise and to exert force with their knee extensors and flexors.

scholarly journals Muscle Damage and Performance after Single and Multiple Simulated Matches in University Elite Female Soccer Players

2021 ◽  
Vol 18 (8) ◽  
pp. 4134
Author(s):  
Tai-Ying Chou ◽  
Kazunori Nosaka ◽  
Trevor C. Chen
Keyword(s):  
Muscle Damage ◽  
Perceived Exertion ◽  
Test List ◽  
Rating Of Perceived Exertion ◽  
Soccer Players ◽  
Knee Extensors ◽  
Performance Decline ◽  
Isometric Torque ◽  
And Performance ◽  
Loughborough Intermittent Shuttle Test

The present study aimed to compare changes in muscle damage and performance parameters after playing single versus multiple soccer matches to examine fixture congestion effects on performance. Twelve elite female university soccer players performed single, three and six consecutive 90-min bouts of the Loughborough Intermittent Shuttle Test (LIST) with ≥12-weeks between conditions in a pseudo-randomized order. Heart rate, blood lactate, rating of perceived exertion and covering distance in each LIST were examined. Changes in several types of muscle damage (e.g., maximal voluntary isometric torque of the knee extensors: MVC-KE) and performance measures (e.g., Yo-Yo Intermittent Recovery Test level 1: YYIR1) were taken before each LIST, 1 h, and 1–5 d after the last LIST. The total distance covered during the LIST was shorter (p < 0.05) in the 2nd–3rd, or 2nd–6th LISTs when compared with the 1st LIST. Changes (p < 0.05) in all measures were observed after the LIST, and the greatest changes were observed after the six than after the three LISTs followed by one LIST (e.g., largest changes in MVC-KE: −26 > −20 > −14%; YYIR1: −31 > −26 > −11%). Many of the variables did not recover to the baseline for 5 d after six LISTs. These suggest that fixture congestion induces greater muscle damage and performance decline than a single match.

scholarly journals Fitness and Performance Testing of Male and Female Beach Soccer Players—A Preliminary Investigation

2021 ◽  
Vol 3 ◽  
Author(s):  
Malte N. Larsen ◽  
Georgios Ermidis ◽  
João Brito ◽  
Cecilie Ørner ◽  
Clarice Martins ◽  
...  
Keyword(s):  
Test Performance ◽  
Weight Bearing ◽  
Preliminary Investigation ◽  
Performance Testing ◽  
Soccer Players ◽  
Specific Test ◽  
Male And Female ◽  
Age Related ◽  
Long Jump ◽  
And Performance

Purpose: This study aimed to compare performance on sand and a firm surface and to describe the physical capacity of male and female beach soccer players.Methods: Sixty-six male and 29 female competitive beach soccer players voluntarily participated in this study. Firstly, within-subjects test scores were compared to scores on a firm surface (criterion validity; n = 15 men) and reconducted on a second occasion (reliability; n = 51 men). Secondly, the best score on sand was retained to compare test performance between ages (classified as below 20, 20–30, and above 30 years) and sexes. Performance assessments included sprint time over 5 and 15 m (once on a firm surface and twice on sand), standing long jump (SLJ, once on a firm surface and twice on sand) and Yo-Yo intermittent recovery level 1 (Yo-Yo IR1, once on a firm surface and once on sand; only data for men were available).Results: Five-m sprint and Yo-Yo IR1 performance on sand were not correlated to performance on a firm surface (P &gt; 0.05). Test-retest reliability was acceptable for the 15-m sprint and SLJ tests (ICC &gt; 0.90; CV &lt; 5%). Performance in 15-m sprint and maximal sprinting speed were moderately lower in male players aged above 30 years. compared to players aged below 30 years (d = 0.35–0.42; P &lt; 0.05). Irrespective of the age group, weight-bearing power-based performance mass was moderately to very largely higher in male players than in female players (d = 0.42–0.88; P &lt; 0.05).Conclusions: The lack of a consistent relationship between performance on sand and on a firm surface might indicate the need to develop specific test batteries for sand-based athletes. Age-related differences in physical performance were evident only in sprint capacity. Further studies are warranted to elucidate our preliminary findings and to develop the sand specific tests.

V˙O2 Kinetics and Performance in Soccer Players after Intense Training and Inactivity

2011 ◽  
Vol 43 (9) ◽  
pp. 1716-1724 ◽  
Author(s):  
PETER M. CHRISTENSEN ◽  
PETER KRUSTRUP ◽  
THOMAS P. GUNNARSSON ◽  
KRISTIAN KIILERICH ◽  
LARS NYBO ◽  
...  
Keyword(s):  
Soccer Players ◽  
Intense Training ◽  
And Performance

scholarly journals Prognostic value of blood-based fibrosis biomarkers in patients with metastatic colorectal cancer receiving chemotherapy and bevacizumab

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Neel I. Nissen ◽  
Stephanie Kehlet ◽  
Mogens K. Boisen ◽  
Maria Liljefors ◽  
Christina Jensen ◽  
...  
Keyword(s):  
Colorectal Cancer ◽  
Metastatic Colorectal Cancer ◽  
Collagen Type ◽  
Performance Status ◽  
Drug Uptake ◽  
Collagen Type Iii ◽  
Serum Samples ◽  
Type Iii ◽  
Poor Treatment ◽  
And Performance

AbstractA desmoplastic colorectal cancer stroma, characterized by excess turnover of the cancer-associated fibroblast derived collagens type III and VI, can lead to reduced drug-uptake and poor treatment response. We investigated the association between biomarkers of collagen type III and VI and overall survival (OS) in patients with metastatic colorectal cancer (mCRC). Serum samples were collected from 252 patients with mCRC prior to treatment with bevacizumab and chemotherapy. Serum concentrations of biomarkers reflecting formation of collagen type III (PRO-C3) and VI (PRO-C6) and degradation of collagen type VI (C6M and C6Mα3) were determined by ELISA. The biomarkers were evaluated for associations with OS, individually, combined, and after adjusting for carcinoembryonic antigen (CEA), lactate dehydrogenase (LDH) and performance status (PS). High baseline levels (> median) of each collagen biomarker were significantly associated with shorter OS (PRO-C3: HR = 2.0, 95%CI = 1.54–2.63; PRO-C6: HR = 1.6, 95%CI = 1.24–2.11; C6M: HR = 1.4, 95%CI = 1.05–1.78; C6Mα3: HR = 1.6, 95%CI = 1.16–2.07). PRO-C3 and PRO-C6 remained significant after adjustment for CEA, LDH and PS. Weak correlations were seen between the collagen biomarkers (r = 0.03–0.59) and combining all improved prognostic capacity (HR = 3.6, 95%CI = 2.30–5.76). Collagen biomarkers were predictive of shorter OS in patients with mCRC. This supports that collagen- and CAF biology is important in CRC.

27‐2: Invited Paper: Soluble Small Molecules in Top Emission OLED Devices from Ink Jet Printing: Requirements and Performance Status

2020 ◽  
Vol 51 (1) ◽  
pp. 391-393
Author(s):  
Sebastian Meyer ◽  
Sebastian Stolz ◽  
Manuel Hamburger ◽  
Hsin-Rong Tseng ◽  
Miriam Engel ◽  
...  
Keyword(s):  
Small Molecules ◽  
Performance Status ◽  
Ink Jet Printing ◽  
Ink Jet ◽  
Jet Printing ◽  
And Performance

Unilateral isometric muscle fatigue decreases force production and activation of contralateral knee extensors but not elbow flexors

2014 ◽  
Vol 39 (12) ◽  
pp. 1338-1344 ◽  
Author(s):  
Israel Halperin ◽  
David Copithorne ◽  
David G. Behm
Keyword(s):  
Muscle Fatigue ◽  
Force Production ◽  
Voluntary Activation ◽  
Knee Extensors ◽  
Elbow Flexors ◽  
Post Intervention ◽  
Nonlocal Effects ◽  
And Performance ◽  
Voluntary Contractions ◽  
Isometric Muscle

Nonlocal muscle fatigue occurs when fatiguing 1 muscle alters performance of another rested muscle. The purpose of the study was to investigate if fatiguing 2 separate muscles would affect the same rested muscle, and if fatiguing the same muscle would affect 2 separate muscles. Twenty-one trained males participated in 2 studies (n = 11; n = 10). Subjects performed 2 pre-test maximum voluntary contractions (MVCs) with the nondominant knee extensors. Thereafter they performed two 100-s MVCs with their dominant knee extensors, elbow flexors, or rested. Between and after the sets, a single MVC with the nondominant rested knee extensors was performed. Subsequently, 12 nondominant knee extensors repeated MVCs were completed. Force, quadriceps voluntary activation (VA), and electromyography (EMG) were measured. The same protocol was employed in study 2 except the nondominant elbow-flexors were tested. Study 1: Compared with control conditions, a significant decrease in nondominant knee extensors force, EMG, and VA was found under both fatiguing conditions (P ≤ 0.05; effect size (ES) = 0.91–1.15; 2%–8%). Additionally, decrements in all variables were found from the first post-intervention MVC to the last (P ≤ 0.05; ES = 0.82–2.40; 9%–20%). Study 2: No differences were found between conditions for all variables (P ≥ 0.33; ES ≤ 0.2; ≤3.0%). However, all variables decreased from the first post-intervention MVC to the last (P ≤ 0.05; ES = 0.4–3.0; 7.2%–19.7%). Whereas the rested knee extensors demonstrated nonlocal effects regardless of the muscle being fatigued, the elbow-flexors remained unaffected. This suggests that nonlocal effects are muscle specific, which may hold functional implications for training and performance.

The symptoms of advanced cancer: relationship to age, gender, and performance status in 1,000 patients

2000 ◽  
Vol 8 (3) ◽  
pp. 175-179 ◽  
Author(s):  
D. Walsh ◽  
S. Donnelly ◽  
L. Rybicki
Keyword(s):  
Advanced Cancer ◽  
Performance Status ◽  
And Performance
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