scholarly journals Association between rapid force production by the plantar flexors and balance performance in elderly men and women

AGE ◽  
2016 ◽  
Vol 38 (5-6) ◽  
pp. 475-483 ◽  
Author(s):  
Ryoichi Ema ◽  
Megumi Saito ◽  
Shunsuke Ohki ◽  
Hirokazu Takayama ◽  
Yosuke Yamada ◽  
...  
Keyword(s):  
Force Production ◽  
Plantar Flexors ◽  
Balance Performance ◽  
Elderly Men ◽  
Men And Women

scholarly journals The Influence of Stretching the Hip Flexor Muscles on Performance Parameters. A Systematic Review with Meta-Analysis

2021 ◽  
Vol 18 (4) ◽  
pp. 1936
Author(s):  
Andreas Konrad ◽  
Richard Močnik ◽  
Sylvia Titze ◽  
Masatoshi Nakamura ◽  
Markus Tilp
Keyword(s):  
Systematic Review ◽  
Lumbar Spine ◽  
Positive Impact ◽  
Meta Analysis ◽  
Force Production ◽  
Performance Parameters ◽  
Plantar Flexors ◽  
Performance Change ◽  
Flexor Muscles ◽  
Hip Flexor

The hip flexor muscles are major contributors to lumbar spine stability. Tight hip flexors can lead to pain in the lumbar spine, and hence to an impairment in performance. Moreover, sedentary behavior is a common problem and a major contributor to restricted hip extension flexibility. Stretching can be a tool to reduce muscle tightness and to overcome the aforementioned problems. Therefore, the purpose of this systematic review with meta-analysis was to determine the effects of a single hip flexor stretching exercise on performance parameters. The online search was performed in the following three databases: PubMed, Scopus, and Web of Science. Eight studies were included in this review with a total of 165 subjects (male: 111; female 54). In contrast to other muscle groups (e.g., plantar flexors), where 120 s of stretching likely decreases force production, it seems that isolated hip flexor stretching of up to 120 s has no effect or even a positive impact on performance-related parameters. A comparison of the effects on performance between the three defined stretch durations (30–90 s; 120 s; 270–480 s) revealed a significantly different change in performance (p = 0.02) between the studies with the lowest hip flexor stretch duration (30–90 s; weighted mean performance change: −0.12%; CI (95%): −0.49 to 0.41) and the studies with the highest hip flexor stretch duration (270–480 s; performance change: −3.59%; CI (95%): −5.92 to −2.04). Meta-analysis revealed a significant (but trivial) impairment in the highest hip flexor stretch duration of 270–480 s (SMD effect size = −0.19; CI (95%) −0.379 to 0.000; Z = −1.959; p = 0.05; I2 = 0.62%), but not in the lowest stretch duration (30–90 s). This indicates a dose-response relationship in the hip flexor muscles. Although the evidence is based on a small number of studies, this information will be of great importance for both athletes and coaches.

scholarly journals Pulse pressure and coronary mortality in elderly men and women from general population

2002 ◽  
Vol 16 (9) ◽  
pp. 611-620 ◽  
Author(s):  
E Casiglia ◽  
V Tikhonoff ◽  
A Mazza ◽  
A Piccoli ◽  
A C Pessina
Keyword(s):  
General Population ◽  
Pulse Pressure ◽  
Elderly Men ◽  
Men And Women ◽  
Coronary Mortality

scholarly journals Improvement of immune functions in elderly men and women after 3 months of vitamin C and vitamin C plus E supplementation

2013 ◽  
Vol 72 (OCE1) ◽  
Author(s):  
M. De La Fuente ◽  
O. Hernández ◽  
C. Sanchez ◽  
F. Arnalich ◽  
A. Hernanz
Keyword(s):  
Vitamin C ◽  
Immune Functions ◽  
Elderly Men ◽  
Men And Women

scholarly journals Force production capacity and functional reflex activity in young and elderly men

2010 ◽  
Vol 22 (5-6) ◽  
pp. 374-382 ◽  
Author(s):  
Urs Granacher ◽  
Markus Gruber ◽  
Albert Gollhofer
Keyword(s):  
Production Capacity ◽  
Force Production ◽  
Reflex Activity ◽  
Elderly Men

RADIOIMMUNOASSAY OF HUMAN PROLACTIN (PRL)

1975 ◽  
Vol 80 (2) ◽  
pp. 262-274 ◽  
Author(s):  
M. Schmidt-Gollwitzer ◽  
B. B. Saxena
Keyword(s):  
Ammonium Acetate ◽  
Human Subjects ◽  
Post Partum ◽  
Marked Change ◽  
Elderly Men ◽  
Men And Women ◽  
Human Prolactin ◽  
Post Menopause ◽  
Lh Rh ◽  
Plasma Prl

ABSTRACT A simple and rapid homologous radioimmunoassay of human prolactin (hPRL), by the use of 66% ethanol containing 6.6% ammonium acetate for the separation of free and bound hormones, has been established. PRL levels showed marked individual and daily variations as well as a circadian periodicity in both men and women. Levels of plasma PRL rose with puberty and decreased during post-menopause and in elderly men (ages 60–73 years). There was no marked change in plasma PRL levels at midcycle; however, in some subjects, luteal levels were slightly higher than follicular levels. Administration of oestradiol-17β caused marked increase in plasma PRL levels during menstrual cycle. During pregnancy, the plasma PRL levels rose as high as 200 ng/ml and decreased within a week or two post-partum. During lactation, the levels were higher and increased with suckling. In a patient with habitual abortion, the plasma PRL level showed a sudden drop prior to abortion. Administration of LH-RH had no effect on the secretion of PRL in human subjects.

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