Door-mounted anchor enables progressive PNF and static stretching to achieve full hip flexor elongation — improving split depth by 4–6 inches in 4 weeks of consistent use.
Door anchor PNF stretching enables contract-relax technique for deeper flexibility gains
Achieves full hip flexor elongation not possible with standard floor-based stretching alone
Improves split depth 4–6 inches in 4 weeks with consistent 10-minute daily sessions
No drilling or tools required — works with any standard door without permanent installation
