Efficiency of muscle work
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The document discusses the efficiency of muscle work. It defines efficiency as the ratio of mechanical work output to total metabolic cost, which can be calculated from oxygen consumption. The efficiency of human muscle has been measured at 18-26% for rowing and cycling. The quadriceps muscle, a large thigh muscle, has an efficiency that has also been measured. Maintaining good muscle activity and using electrical muscle stimulators can help target the communication system between the brain and muscles. The quadriceps contributions to energy generation and dissipation at the knee joint were also examined during different phases of running. Maintaining mechanical efficiency is important for exercise and knee rehabilitation.
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This document discusses muscle energy technique (MET), a manual therapy procedure that involves voluntary muscle contraction against resistance applied by a therapist. It describes the types of muscle contractions involved - isotonic, eccentric, concentric, and isometric. MET uses post-isometric relaxation and reciprocal inhibition to facilitate muscle lengthening. Indications for MET include acute muscle spasm and restricted joints, while contraindications are acute injuries and unstable joints. Benefits of MET include restoring normal muscle tone, strengthening weak muscles, and improved joint mobility. Guidelines are provided for safely applying light contractions over multiple repetitions.
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This document discusses muscle energy technique (MET), a manual therapy that uses precisely controlled voluntary muscle contractions against resistance applied by a therapist. It describes the types of muscle contractions used in MET, including isotonic, eccentric, concentric, and isometric contractions. MET can utilize post-isometric relaxation or reciprocal inhibition to lengthen or relax muscles. The document provides examples of procedures and discusses indications like acute muscle spasm or restricted joints, as well as contraindications like fractures or unstable joints. Potential benefits of MET include restoring normal muscle tone, strengthening weak muscles, and improving joint mobility.
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Efficiency of muscle work
- 1. EFFICIENCY OF MUSCLE WORK Kinesiology FEBRUARY 27, 2017 SCHOOL OF PHYSIOTHERAPY KING EDWARD MEDICAL UNIVERSITY, LAHORE
- 2. Efficiency The efficiency is defined as the ratio of mechanical work output to the total metabolic cost, as can be calculated from oxygen consumption. Human Muscle: The efficiency of human muscle has beenmeasured (in the context of rowing and cycling) at 18% to 26%. Quadriceps Large muscle in front of the thigh, the action of which extends the leg or bends the hip joint. It is a two jointed Muscle(TJM): A type of muscle which is flexor at one joint may also be a flexor or extensor at another joint. Efficiency of Quadriceps: The message system that works between the brain and the muscle has to be targeted to enable good muscle activity to occur. Another way is to use a piece of equipmentcalled an electrical muscle stimulator (EMS), which sends a small electrical current into the muscle it is placed over.
- 3. Quadriceps muscle contributions to energy generation and dissipationat the knee joint during stance, swing and flight phases of level running Mechanical Efficiency Exercise and is one of the most common resistance training type of exercise used to enhance performance in sports and in knee rehabilitation as it produces greatestneural activation than the majority of weight-bearing knee extension exercises. Exercise at a constant work rate have estimated that ATP utilization per work unit either decreased or increased over time during exercise. The blood flow to the exercising muscle and the lactate released from muscle to the blood stream is highly restricted,power output declines over time and the external mechanical work produced during each muscle contraction remains constant. In hip flexion during standing and sustained stance-phase knee flexion during walking, may be critical for balance control with trunk-flexed postures