Sport distribution: where your training time goes

What this is

The sport distribution is a roster-level summary of how an athlete's training time is split across sports over a chosen window. Useful for:

• Sanity-checking that volume is balanced against race demands (a 70.3 athlete who spent 90 percent of recent training on the bike has a problem).
• Spotting drift when an athlete falls into one sport preferentially.
• Comparing actual time-on-task against the macrocycle plan intent.

URL (API): GET /api/athlete/<public_id>/sport-distribution/?days=<N>.

What the response contains

• A list of sports with hours and percentage of total time for the window.
• The total time across all sports.
• The window length (days).

How it is computed

The function aggregates Activity.duration_seconds by Activity.sport across the window. Strength and "other" activities are included so the totals stay honest (a heavy strength block shows up as a chunk of "non-endurance" time).

Where it surfaces

• On the coach dashboard for at-a-glance roster monitoring.
• On the athlete dashboard so they can see the same view.
• Used by the macrocycle deploy logic when comparing planned weekly hours per sport to recent actual hours per sport.

Typical balanced distributions

Roughly typical splits for athletes at various target races:

These are reference points, not prescriptions. The athlete's limiters and the macrocycle phase shift these.

See also: Macrocycle plan basics, Sport analytics page tour.