Table 8.
Acceleration metrics of included studies
| Acceleration/deceleration metric | Unit of measure | Metric definition | % of studies featuring metric | Reference |
|---|---|---|---|---|
| Counts | Counts (number) | Efforts in respective threshold band | 62.9% |
[7, 13, 17, 34, 36–40, 42–44, 47–50, 52, 54, 55, 57, 59, 60, 62, 64–66, 69–72, 76–80, 88–90, 92, 94–99, 101–103, 105–113, 116, 117, 119, 120, 122–124, 126–128, 136–141, 144–148] [36–39, 51, 53, 56, 59, 63, 66, 69, 71, 73, 74, 84–86, 88, 89, 101–103, 108, 109, 112–115, 118, 121–124, 129, 130, 137, 138, 140] |
| Counts (number) per minute | Efforts in respective threshold band with respect to activity time | 31.7% | ||
| Counts (absolute and relative) | Overall absolute and relative count contribution to review | 71.8% | ||
| Distance | Metres | Acc/Dec distance attained in respective threshold band | 13.7% | [7, 32, 33, 35, 40, 41, 45, 57, 67, 68, 79, 87, 93, 113, 125, 142, 143] |
| Per minute | Distance in respective threshold band with respect to activity time and threshold | 3.3% | [84–86, 121] | |
| Per hour | Distance attained in respective threshold band | 0.8% | [46] | |
| Acceleration | m s− 2 | Intensity metric of any magnitude of acc over given analysis period. | 6.7% | [7, 70, 78, 91, 93, 100, 131, 138] |
| Deceleration | m s−2 | Intensity metric of any magnitude of dec over given analysis period. | 4.2% | [7, 47, 70, 78, 100] |
| Acceleration Density Index | Avg Acc/Dec per 10 m; m s− | Average acceleration performed per 10 m of distance covered (Acceleration Load/Distance) | 0.8% | [45] |
| Acceleration Load | Total Acc/Dec; m s−2 |
Sum of acceleration values across the analysed period Average absolute value of all acc/dec data relative to a defined period. Absolute value multiplied by defined duration to convert to load metric |
0.8% | [45] |
| AU | 0.8% | [135] | ||
| Average Accel/Decel | (m s−2) | Absolute acceleration/deceleration values averaged across the specified period | 9.2% | [6, 7, 9–11, 45, 58, 61, 81–83] |
| Time | Seconds | Time in respective threshold band | 4.2% | [7, 75, 93, 104, 113] |
| % time | Time spent as a percentage in respective threshold band | 0.8% | [84] | |
| % time per minute | Percentage time spent in respective threshold band with respect to activity time and threshold | 1.7% | [85, 86] | |
| Minutes per count | Efforts in respective threshold band with respect to activity time | 2.5% | [132–134] | |
| Ratio of Dec:Acc |
Ratio Dec:Acc |
Duration of Dec (High) and Dec (Mod) divided by total Acc time (High + Mod) in each period. | 0.8% | [104] |