It's just that keeping your heart rate in the target range during regular aerobic exercise has been shown to be safe and effective for increasing your aerobic fitness. Exercising above this range can be very uncomfortable and may increase your risk of injury.
Typical daily weight gains for feedlot animals ranges between 0.5kg to 2.5kg per day, while grass fed animals are somewhat lower than this. The following data was collected from a small beef cattle company in Dallarnil in Queensland (approximately 300km north of Brisbane).
One trial showed that calves fed about 7 pounds of creep feed per day consumed about 50 percent less forage when fed corn and 40 percent less forage when fed soybean hulls. In the same study, forage intake was decreased by 12 percent when creep feed was limited to 1.5 pounds per day.n a study conducted in Georgia, Hereford calves were creep fed for 91 days prior to weaning at seven months of age (Rossi et. al., 2004). The study followed the calves through the finishing phase and addresses several of the factors affecting creep feeding listed above.