Poor muscle development, poor flexibility, or poor are factors contributing to the fact that 80 percent of people in the United States suffer from low back pain? True or False

Answera tightly sealed house with an unvented water heater;

Subtract your 2-minute heart rate from the heart rate you took immediately after exercising. the faster your heart rate recovers (or slows down ) the fitter and healthier your heart. if the difference between the two numbers is: less than 22: your biological age is slightly older than your calendar age

Answer(c); risk being sued for negligence;