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Better nasal airflow can improve perceived oxygen intake during cardio

Overuse of xylometazoline can lead to rebound congestion hurting performance later

May improve sleep quality if congestion is reduced indirect recovery benefit

Some users report easier breathing during high-intensity intervals

Anticholinergic effects can slightly reduce mucus buildup during training

Not a substitute for proper conditioning or cardio fitness

Over drying airways might actually feel worse in endurance sessions

Tadalafil boosts blood flow not testosterone

No direct testosterone change within muscle

Muscle testosterone stays steady with tadalafil

Blood flow rises hormones remain unchanged

Muscle androgen levels remain stable here

More pump but same hormone levels inside

It makes muscles more androgen sensitive

Increases blood flow for better pumps