All Posts tagged low load exercises

Low-Load High Volume Resistance Exercise Stimulates Muscle Protein Synthesis More Than High-Load Low Volume Resistance Exercise in Young Men

Nicholas A. Burd1, Daniel W. D. West1, Aaron W. Staples1, Philip J. Atherton2, Jeff M. Baker1, Daniel R. Moore1, Andrew M. Holwerda1, Gianni Parise1,3, Michael J. Rennie2, Steven K. Baker4, Stuart M. Phillips1*

1 Exercise Metabolism Research Group, Department of Kinesiology, McMaster University, Hamilton, Ontario, Canada, 2 School of Graduate Entry Medicine and Health, City Hospital, University of Nottingham, Derby, United Kingdom, 3 Department of Medical Physics and Applied Radiation Sciences, McMaster University, Hamilton, Ontario, Canada, 4 Department of Neurology, Michael G. DeGroote School of Medicine, McMaster University, Hamilton, Ontario, Canada

Background

We aimed to determine the effect of resistance exercise intensity (% 1 repetition maximum—1RM) and volume on muscle protein synthesis, anabolic signaling, and myogenic gene expression.

Methodology/Principal Findings

Fifteen men (21±1 years; BMI = 24.1±0.8 kg/m2) performed 4 sets of unilateral leg extension exercise at different exercise loads and/or volumes: 90% of repetition maximum (1RM) until volitional failure (90FAIL), 30% 1RM work-matched to 90%FAIL (30WM), or 30% 1RM performed until volitional failure (30FAIL). Infusion of [ring13C6] phenylalanine with biopsies was used to measure rates of mixed (MIX), myofibrillar (MYO), and sarcoplasmic (SARC) protein synthesis at rest, and 4 h and 24 h after exercise. Exercise at 30WM induced a significant increase above rest in MIX (121%) and MYO (87%) protein synthesis at 4 h post-exercise and but at 24 h in the MIX only. The increase in the rate of protein synthesis in MIX and MYO at 4 h post-exercise with 90FAIL and 30FAIL was greater than 30WM, with no difference between these conditions; however, MYO remained elevated (199%) above rest at 24 h only in 30FAIL. There was a significant increase in AktSer473 at 24h in all conditions (P = 0.023) and mTORSer2448 phosphorylation at 4 h post-exercise (P = 0.025). Phosporylation of Erk1/2Tyr202/204, p70S6KThr389, and 4E-BP1Thr37/46 increased significantly (P<0.05) only in the 30FAIL condition at 4 h post-exercise, whereas, 4E-BP1Thr37/46 phosphorylation was greater 24 h after exercise than at rest in both 90FAIL (237%) and 30FAIL (312%) conditions. Pax7 mRNA expression increased at 24 h post-exercise (P = 0.02) regardless of condition. The mRNA expression of MyoD and myogenin were consistently elevated in the 30FAIL condition.

Conclusions/Significance

These results suggest that low-load high volume resistance exercise is more effective in inducing acute muscle anabolism than high-load low volume or work matched resistance exercise modes.

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Cardiorespiratory Aerobic Exercise May Be Helpful in Rheumatoid Arthritis

www.Medscape.com

June 30, 2010 — Cardiorespiratory aerobic exercise may be safe and  modestly beneficial in patients with rheumatoid arthritis (RA),  according to the results of a meta-analysis of randomized controlled trials (RCTs) reported in the July issue of Arthritis Care & Research.

“Several lines of evidence have emphasized an improvement in aerobic capacity and muscle strength after physical exercise programs in …RA patients,” write Athan Baillet, MS, from University of Grenoble Medical School in Grenoble, France, and colleagues. 

Benefits associated with the exercise intervention included improved postintervention quality of life, better HAQ score, lower pain VAS scores and less radiologic damage. 

“Cardiorespiratory aerobic conditioning in stable RA appears to be safe and improves some of the most important outcome measures,” the review authors write.

“Besides the positive effect of the intervention on patients’ psychological well-being, aerobic exercise should be considered as a safe therapy, the efficacy of which has been underestimated,” the review authors conclude.

Arthritis Care Res. 2010;62:984-992.

Dr. Tucker’s comment: In my experience in working with RA patients, the key to successful exercise therapy is training patients in low load body weight exercises – these are gentle repetitive movements. Proper training avoids overloading the joints and does not hurt. UltraInFlamX medical food shakes are part of the program when I work with RA patients.

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Posture & Low Load Exercises

Scapular Retraction

Lie with your upper arms straight out to the sides, elbows bent 90°. Pinch shoulder blades together and raise arms level with floor. Keep shoulders down.

Hold for 2 breaths.
Repeat 20 times per set.
Three sets per session.
Complete 1 session per day.

March

Tighten stomach and slowly raise right leg and lower opposite arm over head. Keep trunk rigid, back flat and hips level.

Hold for 2 breaths.
Repeat 20 times per side, per set.
Two sets per session.
Complete 1 session per day.

One Leg Bridging

With legs bent, lift buttocks so hips are level and elevated. Then slowly extend one leg; keep thighs level and stomach tight.

Hold for 30 seconds.
Repeat 2 times per set.
Two sets per session.
Complete 1 session per day.

Lower Abs

Bend both knees, feet together on floor and stomach tight. Slowly lower one knee to the side and return.

Repeat 50 times per side, per set.
One set per session.
Complete 1 session per day.

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Low Back Pain Exercises

Press Up

Relax the buttock and abdomen; fully extend elbows and press up.

Hold for 3-4 seconds.
Repeat 10 times per set.
One set per session.
Complete 3 sessions per day.

Piriformis Stretch

Lie on your back with knees bent. Cross one leg so the ankle rests across the opposite knee. If wanting an added stretch gentle move bent leg toward chest; hold stretch by holding leg under knee. Keep your back flat.

Hold for 30 seconds.
Repeat 1 time per set.
Two sets per side, per session.
Complete as often as needed daily.

Bridge Up & Down

Draw the stomach in and squeeze buttocks as tight as possible. Move the pelvis up and down. If you begin feeling pain in your lower back, pause and start the exercise over again.

Hold for 2 seconds.
Repeat until fatigue.
Two sets per session.
Complete 1 session per day.

Opposite Arm/Opposite Leg (On All Fours)

Tighten stomach and raise right leg and opposite arm. Keep hips level and draw the abdomen in as tight as you can.

Hold for 2 breaths.
Repeat 30 to 50 times per set.
One set per session.
Complete 2 sessions per day.

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