long run

No completed data to compare — this session is still marked "planned," so there is nothing to compare between prescription and actual execution yet. What follows is an assessment of the plan itself in light of the athlete's recent load and physiology, to flag issues before the session happens.

Load-stacking context is a concern. In the 3 days before this "long run," Jonas did an easy long run (1h32, load 95) on 7/4, a gym session on 7/5, and then on 7/6 stacked a sweet-spot bike session (load 88) and a 10 km run in 45 min — a pace of ~4:30/km, notably faster than his own LT2 pace of 5:13/km. That means the day immediately preceding this structured session already included a genuinely hard, above-threshold running effort layered on top of a bike quality session. The literature on triathlon/endurance load management is explicit that changes in training load should be individualized in small increments <10%^[1], and that poor load management with ensuing maladaptation can be a risk factor for acute illness and overtraining^[2]. Sequencing a complex long run with embedded surges right after that kind of two-a-day load is the pattern this guidance warns against.

The threshold zone is unusually narrow, which raises the stakes for pacing precision. LT1 (5:21/km, 151 bpm) and LT2 (5:13/km, 162 bpm) sit only 8 sec/km and 11 bpm apart. The Norwegian double-threshold literature deals with exactly this kind of tight zone by relying on tight external controls rather than feel: anaerobic threshold training is done in the morning and afternoon, mainly in the form of intervals, closely monitored during rest periods using lactate measurement and heart rate monitoring^[3], with morning efforts kept at lactate <2.5 mmol/L and afternoon repeats capped around 3.5 mmol/L to avoid unwanted drift into harder zones. With only ~10 bpm separating "easy-side of threshold" from "hard-side," the "active 10 min @ RPE 5-6" and the 4×3min reps in this session could easily land above LT2 without a hard pace/HR ceiling specified — worth tightening before the session runs.

The session design itself sits oddly against a "long run" label. Stripping out the two 10-min rest blocks, roughly half of the prescribed time (warmup, two 10-min "active" blocks, and 4×3min efforts) is above easy pace, embedded inside what's titled an endurance long run. This runs counter to the polarized pattern associated with the best outcomes in the literature, where world-class triathletes and paratriathletes did 74%, 88%, and 85% of her swim, bike, and run training... below her individual lactate threshold over an entire season, with even higher percentages (82%, 91%, 88%) reported in a world-champion long-distance paratriathlete^[4], and faster Ironman performances are associated with longer training times at low-to-moderate intensities^[5]. If the intent was genuine aerobic development, the intensity blocks are large relative to that model; if the intent was a threshold/quality session, calling it a "long run" and pairing it with a fast run the day before undercuts polarization on both ends.

What the coach should consider next:

• Clarify explicit pace/HR ceilings for the "active 10min @ RPE5-6" block and the 4×3min reps, anchored to LT1/LT2, given how narrow that zone is.
• Given the 7/6 double-load day (sweet spot bike + sub-LT2-pace 10 km run), consider converting 7/7 into a genuinely easy long run or reducing/removing the interval block to respect the <10% load-progression guidance rather than adding another quality stimulus on minimal recovery.
• Confirm the 80-min sum of listed blocks vs. the 100-min planned duration/10 km target — there's an unaccounted ~20 min, likely additional easy running that should be made explicit in the prescription.

Beyond the papers: Practically, I'd flag this to the coach as a session to soften rather than run as written — two hard days back-to-back (bike sweet spot + fast run, then a long run laced with threshold-ish intervals) is the kind of pattern that tends to produce elevated next-day HR at given pace or a flat/heavy-legs feeling, even if no biomarker or well-being data are attached here. Given the tight 8 sec/km, 11 bpm threshold window, I'd also suggest the coach have Jonas run the "active" blocks by feel with a hard pace cap rather than RPE alone, since RPE 5-6 could plausibly drift into LT2 territory on tired legs. The "comon" note in the prescription looks like it may be a typo or placeholder — worth double-checking with the athlete that the session intent (aerobic long run vs. threshold day) was communicated clearly before it's executed.