ArticlePeerJ2015
Effects of load on good morning kinematics and EMG activity.
Article in PeerJ, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
11 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Biceps Femoris Activation during Hamstring Strength Exercises: A Systematic Review.International journal of environmental research and public health · 2021Pooled it
- Biomechanical analysis of single leg deadlift under the effect of instability.Scientific reports · 2026Article
- Changes in Shoulder Girdle Muscle Activity and Ratio During Pilates-Based Exercises.Life (Basel, Switzerland) · 2025Article
- A wearable hip exoskeleton for anaerobic exercise in healthy adults.Scientific reports · 2024Article
- Hamstrings force-length relationships and their implications for angle-specific joint torques: a narrative review.BMC sports science, medicine & rehabilitation · 2022Review
- Comparison of EMG Activity between Single-Leg Deadlift and Conventional Bilateral Deadlift in Trained Amateur Athletes - An Empirical Analysis.International journal of exercise science · 2021Article
- The influence of knee extensor fatigue on lower extremity muscle activity during chair rise in young and older adults.European journal of applied physiology · 2019Article
- Muscle Imbalances: Testing and Training Functional Eccentric Hamstring Strength in Athletic Populations.Journal of visualized experiments : JoVE · 2018Article
- Interpreting Signal Amplitudes in Surface Electromyography Studies in Sport and Rehabilitation Sciences.Frontiers in physiology · 2017Review
- Towards evidence based strength training: a comparison of muscle forces during deadlifts, goodmornings and split squats.BMC sports science, medicine & rehabilitation · 2017Article
- Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Many strength and conditioning coaches utilize the good morning (GM) to strengthen the hamstrings and spinal erectors. However, little research exists on its electromyography (EMG) activity and kinematics, and how these variables change as a function of load. The purpose of this investigation was to examine how estimated hamstring length, integrated EMG (IEMG) activity of the hamstrings and spinal erectors, and kinematics of the lumbar spine, hip, knee, and ankle are affected by changes in load. Fifteen trained male participants (age = 24.6 ± 5.3 years; body mass = 84.7 ± 11.3 kg; height = 180.9 ± 6.8 cm) were recruited for this study. Participants performed five sets of the GM, utilizing 50, 60, 70, 80, and 90% of one-repetition maximum (1RM) in a randomized fashion. IEMG activity of hamstrings and spinal erectors tended to increase with load. Knee flexion increased with load on all trials. Estimated hamstring length decreased with load. However, lumbar flexion, hip flexion, and plantar flexion experienced no remarkable changes between trials. These data provide insight as to how changing the load of the GM affects EMG activity, kinematic variables, and estimated hamstring length. Implications for hamstring injury prevention are discussed. More research is needed for further insight as to how load affects EMG activity and kinematics of other exercises.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.