Pivot the energy expertise into a fractional C-suite or interim executive role (e.g. interim COO/Head of Operations for energy-transition scale-ups) — this monetises 34 years of management depth at €150-250/hr rather than diluting it in an entry-level sports-trainer context.

Activate the influential network by publishing 2-3 short industry perspectives (LinkedIn articles or a niche energy newsletter) — moving from 'passive profile' to 'active/thought leader' visibility could open advisory board seats worth €20-50k/year in retainer income.

Pursue an energy-transition certification (e.g. a recognised renewable energy management credential or board director programme) — at 59 with a broad network, a credentialled board/advisory track is a realistic and higher-value exit than a sports-trainer pivot.