Update injected data

Example request

{
  "stats": [
    {
      "athlete_id": "597e2f33-dc7d-4328-8f12-cc304a90a3f5",
      "period_id": "ddb8b3ac-31f9-46f8-9b27-3b39f68b8926",
      "total_duration": 3608,
      "total_distance": 1532.2,
      "max_vel": 12.1
    }
  ]
}