How does the energetic cost of rowing wary.r with speed? Are there certain speedsthat minimize energetic costs of locomotion? How does the energetic cost of rowing vary with workload (W)? Are there certainworkloads that minimize energetic costs of locomotion? What would be the energetic cost of carrying extra weight {higher body weight}and how does it vary 1mm the amount of weight carried? How does heart rate vary with metabolic rate?