Basal metabolic rate be elevated in stress, illness, and diabetes. Menopause may also affect metabolism. Heart rate is determined by the medulla oblongata and part of the pons, two organs located inferior to the hypothalamus on the brain stem. Heart rate is important for basal metabolic rate and resting metabolic rate because it drives the blood supply, stimulating the Krebs cycle. During exercise that achieves the anaerobic threshold, it is possible to deliver substrates that are desired for optimal energy utilization. The anaerobic threshold is defined as the energy utilization level of heart rate exertion that occurs without oxygen during a standardized test
Set the Controls for the Heart of the Sun review for "A Saucerful of Secrets", Jim Miller of "Rolling Stone" described "Set the Controls for the Heart of the Sun", along with "Let There Be More Light", as "boring melodically, harmonically, and lyrically." Miller further described the production work as "not as glittery as the first album's, and the instrumental work is shoddy and routine. Miller also described the track as too long. Pink Floyd performed the song from 1967 to 1973. A performance on 9 September 1967 featured Barrett and Waters switching guitars. The last ever performance of the song by Pink Floyd took place on 13 October