In one of the latest videos on the Wiffen Twins YouTube channel, Olympic Champion Daniel Wiffen shows a long-course “Threshold Tuesday” practice from February 3rd, which he completes with former NCAA National Champion Lucas Henveaux in Berkeley.
The set alternates between red and white heart rate zones, increasing the distance and lowering the rest as the set progresses. With the bulk of the set (300s) being at a higher effort than the in-between sets.
The set is as follows:
- 1×300 RED (150-170 BPM) @ 3:30
- 6×100 WHITE (120-140 BPM) @ 1:20
- 2×300 RED (150-170 BPM) @ 3:30
- 3×100 WHITE (120-140 BPM) @ 1:20
- 3×300 RED (150-170 BPM) @ 3:30
Leading the set was Cal assistant coach Noah Yanchulis, who took splits for both Wiffen and Henveaux.
Though we did not get a clear visual of the times that each swimmer threw down, from what could be seen: here is what appeared each swimmer clocked for each 300 of the set (as seen at the 1:42 mark in the video).
| Henveaux | Wiffen |
| 3:01.2 | 3:00.7 |
| 3:01.5 | 3:00.5 |
| 2:59.9 | 2:58.5 |
| 3:01.1 | 3:00.8 |
| 3:00.7 | 3:00.0 |
| 3:00.5 | 3:02.2 |
Wiffen last competed at the Pro Swim Series in Austin where he won the 800 free (7:50.37), and finished 8th in the 400 free after coming out of prelims as the top seed in 3:51.22. He is entered in Westmont as the top seed in the 800 free, ahead of American distance ace Bobby Finke, and sits sandwiched in between Finke and Australian Sam Short in the 1500.
He also sits as the #8 seed in the 400 free, four spots back of Henveaux, and over five seconds off of Shorts top seed entry time.
Last summer, Wiffen dealt with appendicitis, which affected his training leading up to the World Aquatics Championships and led him to miss the 400 free final, placing 16th in 3:47.57. He did earn one finals appearance, finishing 8th in the 800 free (7:38.19).
In early December, Wiffen won the 1500 free at the European Short Course Championships in 14:13.96, on top of a pair of 3rd place finishes in the 800 free (7:30.14) and 400 free (3:37.02).
In an interview at the Austin Pro Series in January, Wiffen said he aims to complete the Grand Slam in 2026, with his eyes on winning events at the Commonwealth Games, European Championships, and Short Course World Championships.
