TABLE 1. Timeline of classes and characteristics of instructors and participants at three fitness facilities — Hawaii, June 27–July 11, 2020.
| Fitness facility | Date | Class time | Exercise | Instructor | Instructor masked | No. of participants (no. masked) | No. of participants with SARS-CoV-2 test and outcome* |
Attack rate, %§ | ||
|---|---|---|---|---|---|---|---|---|---|---|
| RT-PCR positive | RT-PCR negative | Asymptomatic, not tested† | ||||||||
| X |
Jun 27 |
AM |
Yoga |
A |
Yes |
27 (0) |
0 |
1 |
26 |
0 |
| Y |
Jun 28 |
PM |
Stationary cycling |
A |
No |
4 (0)¶,** |
0 |
4 |
0 |
0 |
| Y |
Jun 29 |
PM |
Stationary cycling |
A |
No |
10 (0)** |
10 |
0 |
0 |
100 |
| Z |
Jun 30 |
AM |
PT |
B |
Yes |
3 (3)¶ |
0 |
1 |
2 |
0 |
| Z |
Jun 30 |
PM |
Kickbox |
B |
No |
3 (0)¶ |
0 |
0 |
3 |
0 |
| Z |
Jul 1 |
AM |
PT |
B |
No |
4 (0) |
1 |
2 |
1 |
25 |
| Z |
Jul 2 |
AM |
PT |
B |
No |
2 (0)†† |
1 |
1 |
0 |
50 |
| Z | Jul 2 | PM | Kickbox | B | No | 9 (2) | 9 | 0 | 0 | 100 |
Abbreviations: PT = personal training; RT-PCR = reverse transcription–polymerase chain reaction.
* SARS-CoV-2 RT-PCR test result conducted within 2 weeks of last exposure.
† Participant was not tested for SARS-CoV-2 and reported no fever, cough, shortness of breath, muscle or body aches, fatigue, headache, congestion, runny nose, sore throat, or new loss of sense of taste or smell for 14 days after last exposure.
§ Participants who were not tested and reported no symptoms for 14 days after exposure were considered not infected and categorized as negative for attack rate calculations.
¶ Participants who had more than one exposure date to the instructor were only included in the class counts and attack rate for the last exposure date.
** Instructor B was a class participant.
†† Included a caregiver of a participant.