What free weights do I need to start a home gym?

A solid starting point is a set of hex dumbbells in a useful weight range, a standard Olympic barbell with plates, and bumper plates if you plan to do any overhead or Olympic-style lifting. Add kettlebells as your training expands.

What is the difference between bumper plates and iron plates?

Bumper plates are made from solid rubber and are designed to be safely dropped from overhead or waist height. Iron plates are more compact and less expensive but should not be dropped. Most strength rooms benefit from having both.

Should I choose fixed or adjustable dumbbells for a home gym?

Fixed dumbbells are faster to grab and more durable under heavy use. Adjustable dumbbells save space and cover a wide weight range with one pair. Many home gym owners start with adjustable and add fixed heavy pairs as their training progresses.