Why is anaerobic respiration considered less efficient than aerobic respiration? a less energy is required during anaerobic respiration than aerobic respiration. b more oxygen is required for anaerobic respiration than for aerobic respiration. c more atp molecules are gained in aerobic respiration than in anaerobic respiration. d less lactic acid is formed during anaerobic respiration than during aerobic respiration.

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.