LBNP treadmill exercise maintains spine function and muscle strength in identical twins during 28-day simulated microgravity

2007 ◽  
Vol 102 (6) ◽  
pp. 2274-2278 ◽  
Author(s):  
Brandon R. Macias ◽  
Peihong Cao ◽  
Donald E. Watenpaugh ◽  
Alan R. Hargens
Keyword(s):  
Lumbar Spine ◽  
Muscle Strength ◽  
Lumbar Lordosis ◽  
Treadmill Exercise ◽  
Lower Body Negative Pressure ◽  
Bed Rest ◽  
Intervertebral Disk ◽  
Identical Twin ◽  
Back Muscle ◽  
Back Muscle Strength

The purpose of this study was to determine whether lower body negative pressure (LBNP) treadmill exercise maintains lumbar spinal compressive properties, curvature, and back muscle strength after 28 days of 6° head-down tilt (HDT) bed rest (BR). We hypothesize that LBNP treadmill exercise will maintain lumbar spine compressibility, lumbar lordosis and back muscle strength after 28 days of 6° HDT bed rest. Fifteen healthy identical twin pairs (14 women and 16 men) participated in this study. One identical twin was randomly assigned to the nonexercise control (Con) group, and their sibling was assigned to the exercise (Ex) group. The lumbar spine was significantly more compressible Post-BR compared with Pre-BR in the Con ( P = 0.01). Lumbar spine compressibility Post-BR was not significantly different compared with Pre-BR in the Ex group ( P = 0.89). In both the Con and Ex groups, there were no significant changes Post-BR in lumbar lordosis compared with Pre-BR. Back muscle strength significantly decreased in the Con group Post-BR ( P = 0.002), whereas in the Ex group back muscle strength was not significantly different from Pre-BR values. A significant increase in lumbar spine compressibility in the Con group suggests that spinal deconditioning to gravity occurs during 28-day bed rest. Changes in the mechanical properties of the lumbar spine may be an early indicator of lumbar intervertebral disk degeneration. Supine LBNP treadmill exercise provides axial loads to the lumbar spine and may prevent lumbar spine deconditioning associated with HDT bed rest.

Exercise within lower body negative pressure partially counteracts lumbar spine deconditioning associated with 28-day bed rest

2005 ◽  
Vol 99 (1) ◽  
pp. 39-44 ◽  
Author(s):  
Peihong Cao ◽  
Shinji Kimura ◽  
Brandon R. Macias ◽  
Toshiaki Ueno ◽  
Donald E. Watenpaugh ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Negative Pressure ◽  
Treadmill Exercise ◽  
Lower Body Negative Pressure ◽  
Bed Rest ◽  
Intervertebral Disk ◽  
Lower Body ◽  
Axial Loads ◽  
Supine Posture ◽  
Lumbar Spinal

Astronauts experience spine deconditioning during exposure to microgravity due to the lack of axial loads on the spine. Treadmill exercise in a lower body negative pressure (LBNP) chamber provides axial loads on the lumbar spine. We hypothesize that daily supine LBNP exercise helps counteract lumbar spine deconditioning during 28 days of microgravity simulated by bed rest. Twelve sets of healthy, identical twins underwent 6° head-down-tilt bed rest for 28 days. One subject from each set of twins was randomly assigned to the exercise (Ex) group, whereas their sibling served as a nonexercise control (Con). The Ex group exercised in supine posture within a LBNP chamber for 45 min/day, 6 days/wk. All subjects underwent magnetic resonance imaging of their lumbar spine before and at the end of bed rest. Lumbar spinal length increased 3.7 ± 0.5 mm in the Con group over 28-day bed rest, whereas, in the Ex group, lumbar spinal length increased significantly less (2.3 ± 0.4 mm, P = 0.01). All lumbar intervertebral disk heights (L5–S1, L4–5, L3–4, L2–3, and L1–2) in the Con group increased significantly over the 28-day bed rest ( P < 0.05). In the Ex group, there were no significant increases in L5–S1 and L4–5 disk heights. Lumbar lordosis decreased significantly by 3.3 ± 1.2° during bed rest in the Con group ( P = 0.02), but it did not decrease significantly in the Ex group. Our results suggest that supine LBNP treadmill exercise partially counteracts lumbar spine lengthening and deconditioning associated with simulated microgravity.

PENGARUH SENAM JANTUNG SEHAT SERI-I TERHADAP DAYA TAHAN JANTUNG-PARU, KEKUATAN OTOT DAN KADAR TNF-? PLASMA PADA LANJUT USIA

2019 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Ajeng Fitria ◽  
Leonardo Lubis ◽  
Ambrosius Purba
Keyword(s):  
Muscle Strength ◽  
Health Workers ◽  
The Elderly ◽  
Moderate Intensity ◽  
P Value ◽  
Back Muscle ◽  
Back Muscle Strength ◽  
Shoulder Muscles ◽  
Before And After ◽  
Post Test

The increasing number of elderly and elderly life expectancy is a challenge for health workers. Decreased cardiac endurance, muscle strength and increased incidence of inflammation will occur in the elderly as we get older. health cardio exercises series-I is an aerobic exercise that has moderate intensity and is carried out for 30 minutes, research is needed to analyze the effect on cardiac endurance, muscle strength and decrease plasma TNF-? levels in the elderly. Research design with experimental method, pre-test and post-test design approach. The study was conducted for 4 weeks on 25 samples which were divided into 3 groups of frequency of health cardio exercises series-I to measure endurance of the heart. A 6-minute road test and muscle strength were used for hand grip strength dynamometer, test back and leg dynamometer. Measurement of plasma TNF-? levels is carried out using the Elisa method. The data was then analyzed using paired t-test to see differences before and after health cardio exercises series-I. The results showed health cardio exercises series-I performed 3x / mg can increase the heart's endurance compared to the frequency of 4x / mg and 5x / mg (-16.11 vs 15.62 vs -47.62 meters). health cardio exercises series-I frequency of 3x / mg and 4x / mg can increase back muscle strength (p-value = 0.019, p <0.05) and the frequency of 5x / mg can increase the strength of attractive shoulder muscles. (p-value = 0.033, p <0.05). Health cardio exercises series-I performed 3x / mg, 4x / mg and 5x / mg did not have a significant effect on plasma TNF-? protein expression in the elderly (0.506 vs 0.856 vs. 0.382, p <0.05). It is suggested that the elderly can do I-1 series heart exercise with a frequency of 3x / mg to increase the heart's lung endurance and back muscle strength, a health cardio exercises series-I 4x / mg series to increase muscle strength of the back back, a series of health cardio exercises series-I frequency of 5x / mg to increase attractive shoulder muscle strength.

scholarly journals LBNP exercise protects aerobic capacity and sprint speed of female twins during 30 days of bed rest

2009 ◽  
Vol 106 (3) ◽  
pp. 919-928 ◽  
Author(s):  
Stuart M. C. Lee ◽  
Suzanne M. Schneider ◽  
Wanda L. Boda ◽  
Donald E. Watenpaugh ◽  
Brandon R. Macias ◽  
...  
Keyword(s):  
Treadmill Exercise ◽  
Lower Body Negative Pressure ◽  
Bed Rest ◽  
Exercise Group ◽  
Peak Oxygen Consumption ◽  
Control Group ◽  
Treadmill Test ◽  
Sprint Speed ◽  
Long Duration ◽  
Volitional Fatigue

We have shown previously that treadmill exercise within lower body negative pressure (LBNPex) maintains upright exercise capacity (peak oxygen consumption, V̇o2peak) in men after 5, 15, and 30 days of bed rest (BR). We hypothesized that LBNPex protects treadmill V̇o2peak and sprint speed in women during a 30-day BR. Seven sets of female monozygous twins volunteered to participate. Within each twin set, one was randomly assigned to a control group (Con) and performed no countermeasures, and the other was assigned to an exercise group (Ex) and performed a 40-min interval (40–80% pre-BR V̇o2peak) LBNPex (51 ± 5 mmHg) protocol, plus 5 min of static LBNP, 6 days per week. Before and immediately after BR, subjects completed a 30.5-m sprint test and an upright graded treadmill test to volitional fatigue. These results in women were compared with previously reported reductions in V̇o2peak and sprint speed in male twins after BR. In women, sprint speed (−8 ± 2%) and V̇o2peak (−6 ± 2%) were not different after BR in the Ex group. In contrast, both sprint speed (−24 ± 5%) and V̇o2peak (−16 ± 3%) were significantly less after BR in the Con group. The effect of BR on sprint speed and V̇o2peak after BR was not different between women and men. We conclude that treadmill exercise within LBNP protects against BR-induced reductions in V̇o2peak and sprint speed in women and should prove effective during long-duration spaceflight.

scholarly journals Back muscle strength and spinal mobility are predictors of quality of life in middle-aged and elderly males

2010 ◽  
Vol 20 (6) ◽  
pp. 954-961 ◽  
Author(s):  
Shiro Imagama ◽  
Yukihiro Matsuyama ◽  
Yukiharu Hasegawa ◽  
Yoshihito Sakai ◽  
Zenya Ito ◽  
...  
Keyword(s):  
Quality Of Life ◽  
Muscle Strength ◽  
Spinal Mobility ◽  
Back Muscle ◽  
Middle Aged ◽  
Back Muscle Strength ◽  
Elderly Males

scholarly journals Criterion-Related Validity of a Simple Muscle Strength Test to Assess Whole Body Muscle Strength in Chinese Children Aged 10 to 12 Years

2018 ◽  
Vol 2018 ◽  
pp. 1-11 ◽  
Author(s):  
Liqin Yin ◽  
Changfa Tang ◽  
Xia Tao
Keyword(s):  
Muscle Strength ◽  
Strength Test ◽  
Whole Body ◽  
Back Muscle ◽  
Back Muscle Strength ◽  
Body Muscle ◽  
Hand Grip ◽  
Standing Long Jump ◽  
Long Jump ◽  
Leg Muscle

Objective. To study the criterion-related validity of simple muscle strength test (SMST) indicators and assess whole body muscle strength in Chinese children aged 10 to 12 years old.Methods. Two hundred and forty children were equally divided into four groups in different genders and residences. The SMST indicators (hand-grip, knee bent push-up, back muscle strength, sit-up, leg muscle strength, and standing long jump) were tested. We set up the total level of the whole-body muscle strength (Ftotal) through testing isokinetic muscle strength of the six joints’ flexion and extension movements. Pearson correlation analyses were used to analyze the correlation between the SMST indicators and theFtotal.Results.(1)Leg muscle strength and back muscle strength demonstrated the highest validity scores. Sit-ups, hand grip, and standing long jump demonstrated the lowest validity scores.(2)Leg muscle strength had the highest validity for males, but back muscle strength had the highest validity for females.Conclusions. Back muscle strength and leg muscle strength can give the highest validity of assessing whole body muscle strength, and also has higher validity in both the urban and rural children. For urban children, but not rural, the knee bent push-up also has a high validity indicator.

Prediction of Ratings of Lifting Difficulty from Individual and Task Variables

1978 ◽  
Vol 20 (4) ◽  
pp. 481-487 ◽  
Author(s):  
Stephan A. Konz ◽  
Jacobus Coetzee
Keyword(s):  
Muscle Strength ◽  
Standard Error ◽  
Back Muscle ◽  
Point Scale ◽  
Maximum Weight ◽  
Back Muscle Strength ◽  
Good Index ◽  
Task Variables ◽  
And Task

Subjects (6 male, 6 female) lifted and lowered boxes at eight variations of location and direction. For each of the eight, there were three weights (5, 10, and 15 kg for males, 5, 7.5, and 10 for females), three volumes (150, 225, and 300 mm cubes), and two techniques (bend and squat); 144 conditions in all. Subjects rated difficulty using a 7-point scale (1 = prepared to do continuously, 3 = 1110 min for 8 hr, 5 = 1/120 min for 8 hr, 7 = refuse to do). For the same weight, females rated tasks more difficult than males. In addition, for each additional kg of weight, the female rating increased 0.44 versus 0.14 for males. The effect of volume was significant for females but not males. Lowering was 3% easier than lifting. Bending was 2% easier than squatting. Isometric back muscle strength is a good index of the maximum weight a person will lift (r = 0.84; rating standard error = 0.4).

Impact of spinal imbalance and back muscle strength on locomotive syndrome in community-living elderly people

2012 ◽  
Vol 17 (5) ◽  
pp. 532-537 ◽  
Author(s):  
Kenichi Hirano ◽  
Shiro Imagama ◽  
Yukiharu Hasegawa ◽  
Norimitsu Wakao ◽  
Akio Muramoto ◽  
...  
Keyword(s):  
Muscle Strength ◽  
Elderly People ◽  
Community Living ◽  
Locomotive Syndrome ◽  
Back Muscle ◽  
Back Muscle Strength ◽  
Spinal Imbalance
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