Let me start by defining what qualifies as a workout , after which I will suggest the best workout equipment.

The purpose of exercise is to improve your body’s performance capabilities i.e. strength, stamina & endurance, mobility & flexibility. When you do something to enhance your capabilities in all these areas, that qualities as a workout.

To build your strength, the best equipment for small spaces would be

1. Dumbbells Set ( useful for everyone )
2. TRX ( useful for everyone )
3. Resistance Bands ( useful for everyone )

To build your stamina & endurance, the best equipment for small spaces would be 

1. Indoor cycle ( safest options for overweight people )
2. Indoor treadmill ( safest options for overweight people )
3. Skipping Rope ( useful for most )

To enhance your flexibility and mobility, the best equipment for small spaces would be

1. Straps ( useful for everyone )
2. Foam rollers ( useful for everyone )

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