Baseline Measurement
Also known as: baseline, starting measurement
A baseline measurement is the first recorded data point for a metric, captured before training begins, that all future improvement is measured against.
You cannot know whether you improved without knowing where you started. A baseline gives every subsequent measurement a reference point. In SwingVantage, a baseline is usually the first analyzed swing session. It sets the starting confidence score, the primary fault, and the metric values that will be retested. Baselines should be representative: recorded under normal conditions, not an unusually good or bad session.
Record your baseline session on a day when you are well-rested and hitting normally — avoid recording after a long lesson where you are experimenting, as this produces a distorted starting point for all future progress comparisons.
Take at least 10 swings for your baseline session (not 3-5) to reduce sample noise. A 10-rep baseline gives you a meaningful average and standard deviation that makes future session comparisons statistically valid.
Example
Before starting a path-correction program, a golfer records a baseline session showing an average path of +8 degrees (in-to-out). All future retests compare against this number.
Why it matters
Without a baseline, improvement is a feeling. With one, it is a measurable fact.
How it shows up on video
A baseline video should look like a normal, unforced session — do not try harder than usual for the baseline record. Video showing visible extra effort peaks or especially cautious swings will produce a baseline that does not represent your natural movement pattern.
Common mistakes
- Recording a baseline immediately after a lesson where you are experimenting with new feels — lesson-day mechanics are not representative of your natural movement.
- Using only 3-5 swings for the baseline — too small a sample produces a noisy starting point that makes subsequent improvement deltas unreliable.
- Not flagging equipment or setup changes that happened around the time of the baseline. A new grip or different ball type can shift baseline values without any mechanical change.
- Re-recording a baseline after a bad session to get a worse starting point — baseline manipulation defeats the purpose of objective progress tracking.
In SwingVantage Motion Lab
In Motion Lab, your baseline session is stored as the reference overlay — on any subsequent session, toggling the baseline overlay shows the exact position difference at each checkpoint between where you started and where you are now.
Related terms
- RetestA retest is a short follow-up protocol attached to each recommendation. It sets the shot count, metrics, and success criteria that show whether a fix worked.
- Improvement DeltaAn improvement delta is the measured change in a metric from your baseline to your most recent measurement. It is the hard number behind "did I get better?"
- Retest DeltaA retest delta is the change from your pre-drill baseline to your post-drill retest, on the metric your fix targeted. It shows if one session moved the needle.
- Progress TrackingProgress tracking is the longitudinal record of how your key metrics change over multiple sessions and retests, displayed as a timeline that shows improvement, plateaus, and regressions.
Put this into your swing
SwingVantage can spot this in your own swing — free to start.