Bone Mineral Density is the standard measurement of how much mineral content is packed into bone, reflecting its strength. It’s typically obtained with a DEXA scan and reported as a T-score or Z-score to assess osteoporosis risk and guide treatment. The other phrases aren’t used in practice: “Bone Mass Density” isn’t the accepted term; “Bone Matrix Density” would refer to the organic part of bone rather than minerals; and “Bone Mineral Development” describes growth and remodeling rather than a current density measurement.

Tempo training uses four numbers to control how you move through a lift: eccentric time (lowering), a pause at the bottom, concentric time (lifting), and a pause at the top. A truly controlled descent includes both a defined lowering duration and a pause at the bottom before driving up, which enforces technique and prevents momentum bouncing. The cadence that best shows this is the one with a nonzero bottom pause, meaning you lower for a set time, pause at the bottom, then rise with a set tempo (and you can also have a top pause in some protocols). For example, a pattern like 2 seconds down, a 1-second pause at the bottom, 2 seconds up, and a 1-second pause at the top demonstrates both a deliberate eccentric and a pause. This emphasis on the bottom pause is what makes the movement controlled rather than a quick, momentum-driven lift. Other cadences that skip the bottom pause or have no pause at all don’t reinforce the same level of control.

During a blood pressure measurement the arterial pressure peaks with each heartbeat. The first number is the peak pressure in the arteries when the heart contracts and ejects blood into the aorta and systemic circulation, so it represents the systolic pressure. The second number, measured when the heart relaxes and the arteries refill, is the diastolic pressure. The difference between the two gives pulse pressure, and mean arterial pressure is a weighted average of the two values. So in a reading like 110/70, 110 mmHg is the systolic pressure.

Autoregulation adjusts training stress based on how you feel and perform on a given day. Using rate of perceived exertion (RPE) lets you gauge effort and dial in the appropriate load or reps to hit a target intensity, so your workouts reflect daily readiness. A fixed percentage of 1RM doesn’t account for daily variation—you might be stronger or more fatigued than usual, making the same load too easy or too hard. Ignoring readiness means you’re not adapting to how you’re actually feeling. Training at the same pace ignores fatigue and recovery state and won’t respond to day-to-day fluctuations. With RPE, you can aim for a specific effort (for example, matching sets to an RPE you’re targeting) and adjust accordingly, which is the essence of autoregulation.