Biological Rhythms
This type of biological rhythm lasts less than 20 hours and includes processes like heartbeat and sleep cycles.
This brain structure, located in the hypothalamus, acts as the body's central biological clock.
What is the suprachiasmatic nucleus (SCN)?
A physiological system that follows a circadian rhythm.
What is our sleep-wake cycle, or hormone secretion, or body temperature, or metabolism, or cardiovascular health?
Most forms of exercise peak in performance between afternoon and early evening, coinciding with a peak in this physiological factor.
What is core body temperature?
The most well known infradian rhythm in women.
What is the menstrual cycle?
This biological rhythm lasts between 20 and 28 hours and includes the sleep-wake cycle in humans.
What is the circadian rhythm?
The circadian rhythm is influenced by many zeitgebers, but what is the strongest one?
What is light?
What is melatonin?
This type of exercise peaks in the early afternoon due to optimal fine motor control.
What is technical skill-based exercise?
The phase of the menstrual cycle best for resistance training due to high estrogen levels
What is the late follicular phase?
The length of the human circadian rhythm is slightly longer than 24 hours. How long is it exactly?
What is 24.18 hrs (or 24 hrs and 11 min)
Clock genes regulate the circadian rhythm through this type of biological loop, in which they inhibit their own expression.
What is a negative feedback loop?
This stress hormone peaks in the morning to help wake you up and declines throughout the day.
What is cortisol?
Long-duration endurance exercise performance is best at this time of day.
What is the morning?
This hormone, highest in the late follicular phase, helps protect muscles from damage.
What is estrogen?
These external cues, such as light and temperature, help regulate biological rhythms.
What are zeitgebers?
Although the SCN is the body's master clock, these clocks exist in tissues like muscle and adipose tissue, and have influence over metabolism and other physiological functions.
What are peripheral clocks?
Blood pressure and heart rate are highest at these times.
What is the morning and afternoon?
Higher core temperature in the afternoon strengthens bonds between these two muscle proteins, improving contractions.
What are actin and myosin?
Time to exhaustion is reduced during endurance exercise in the mid-luteal phase due to this factor.
What is a higher core body temperature?