Focus on your posture when you’re running. It’s important that your hips, back and neck are aligned. Wrong posture can lead to stiffness and fatigue.
Look ahead and don’t look at your feet when you’re running. Looking down while running puts great strain on your neck, which might lead to fatigue.
Don’t skip breaths while running.Most runners find that while running, mouth breathing helps them the most.However, every runner has his/her own technique.