how to build strenght, muscle size and stamina

Build all three by training consistently, choosing exercises that match each goal, and progressively increasing the challenge over time.

• Strength: Practice compound movements—such as presses, pulls, squats, and hinges—with heavy loads, typically around 85% or more of your one-rep max for about five or fewer reps per set. Warm up progressively, do roughly 2–3 working sets, and rest 2–4 minutes between demanding sets. 1 2 3 4
• Muscle size: Use resistance that lets you perform roughly 30–80% of your one-rep max, and accumulate about 5–15 sets per muscle group each week. Prioritize controlled, challenging work that targets the muscle; most sets need not go to failure. 5 6 For muscle growth, a broad rep range can work if the final repetitions are hard. 7 8
• Stamina/endurance: Target the kind you mean: muscular endurance (for example, repeated push-ups), hard efforts lasting about 30 seconds to 2 minutes, VO₂-max-type efforts of 3–12 minutes, or continuous endurance lasting over 30 minutes. These are distinct adaptations, so train the relevant activity and duration. 9
• Progression and consistency: Keep a routine you can repeat, and gradually increase weight, reps, training frequency, range of motion, or movement difficulty. Repeating the same unchanging workout may maintain fitness but is unlikely to keep improving it. 10 11

Strength, size, and stamina overlap, but emphasizing one requires training specifically for it. (The excerpts provide training principles, not a complete individualized weekly schedule.)